Good thread about the Buhlert Jagdpanther!!!! I took the maps and teh diagrams from an old book I have: Der Westwall - Vom Denkmalwert des Unerfreulichen ISBN 3-7927-1668-2 But it's hard to find, I came across the maps on the internet once, I think it was a dutch site. I will try if I can find it!
Thanks for the info. It's always helpful to be armed with as much detail on bunker locations as possible as you can very easily pass one in the forest without knowing it is there!
I will look into the map....but I can pass you on kmz.files with bunkers...loads of them, but you can't tell what you will find beforehand. I also have maps with all the remaining bunker ruins for the sector of the german-luxembourgish border.
The .kmz files interest me as it would be handy to view the bunker locations in Google Earth. I will PM you with my email address.
The history channel had an episode on a flak tower in Berlin. It is mostly buried and hidden, but the host was able to go in. The amazing part is that the French tried to blow it up and it was so well built that they were unable to.
There were supposedly 180 bunkers around the village of Wallendorf. I found the few remaining ones and put them on a map. Apart from the Westwall fortifications, the "propaganda battle" around Wallendorf that raged in the beginning of 1945 should be mentioned! While the german propaganda machine launched a big campaign around a made up story of US Army trops deliberately putting the village ablaze and slaughtering civilians, the GI's had scuttlebut running about civilians luring the GI's into an ambush by putting up white flags. Apparently there was also a popular legend that a "Lady in white" or a "White ghost" guided the US fire by hovering around the Wehrmacht positions. But back to the Westwall. Unfortunately I didn't find all the floorplans relating to the bunkers I found, and I can't tell for sure what type it was for all of them. Maybe I can add some more info later. The lower left part of the map shows a small bit of Luxembourgish territory, scale is 1:10 000. The border runs along the river Our. Regelbau 20A Bunker at the Our Bridge (Marked as 1/1 on the map) This is a "Pak-Schartenstand" of the "1937 Pionnierprogramm" Copyrght: Kees Leijsen View from the luxembourgish side on to the bunker, the firing port can be seen as a black surface in the stonewall, more or less in the center of the pic, to the left of the yellow traffic sign. Another view of the firing port, note the concrete walls of the bunker to the right, that have not been camouflaged by stone walls. As far as I could find out the right part of the stone wall is an original camouflage of the bunker. View towards Luxembourg through the firing port. The mount where the Pak 37 could be fixed. The concrete arc on the floor and the small recess on every side at the end of the arc. This is the sliding table to open the spurs of the Pak and the recesses were meant to take the spurs. The wide entry for the Pak 37 at the end of the bunker, this is where the big, two piece armoured door was. German Pak 37. More pics from the inside of the bunker. Regelbau 23 bunker on the ridgeline, overlooking the valley. (Marked as 1/2 on the map) This is a "MG-Schartenstand" of the "Limes-Programm" Copyright Kees Leijsen The Sauer river in the foreground and to the left, the Our river valley in the background to the right, as seen from the bunker. Wallendorf/Germany is on the right side or the river, Wallendorf-Pont/Luxembourg on the left. The Our river valley, the village in the background is Hoesdorf on the luxembourgish side of the border The remants of the bunker. The inside of the destroyed bunker. Bunker of an unidentified type (Marked as 1/3 on the map) The camouflage paint is well preserved. Painting was not the only camouflage applied to the bunkers, often they were disguised by fake wooden barns or garden sheds, sometimes even by houses built on top. A machine gun firing port. The inside of the blown-up bunker Bunker of an unidentified type (Marked as 1/4 on the map)
Underground tunnel system (Marked as 2/1 on the map.) In the small and narrow valley of the "Klingerbach" creek, next to an old Farm, near Edingen in the Sauer river valley, you can find the entrances of an underground Divisional Command Post. This is a "Minierte Anlage" which means a tunnel blown and drilled into the rock. The works on the tunnel system were not completed, the plan where the three tunnels can be seen is actually the accurate rendition of the work that had been achieved untill autumn 1940 when, after the "Blitzkrieg" against France, construction work was stopped in order to divert the resources to the "Atlantikwall". I can't tell what the definite plans were, but I'm quite confident that at least two parallel tunnels connecting the existing three entrance tunnels would have been build, as well as several rooms.[/B] During one of my visits I met an old Lady who lives on the farm nearby, she told me that during the Bulge and the fightings along the border, civilians used the tunnels as shelter. As the command post was never finished it can be said with a high degree of certainty that the existing tunnels were never used by the Wehrmacht.
Edingerberg, on the border with Luxembourg, lies a few kilometers to the south-east of the town of Echternach. There are quite a few ruins of Westwall fortifications. Bunker with trench system (Marked as 2/2 on the map) This is quite a good example of how thoroughly the old fortifications have been destroyed in some places. One can hardly see that there was a bunker, the only thing that is abnormal is a very flat raise in the terrain. The bunker was actually under the copse of small trees in the foreground. The same place, as seen from the inside of the forest. The emplacement of the bunker is to the right in the back. In the center of the photo one can see an old trench that connects the main trenchline to a big dug-out to the rear of the bunker, the corner of this dug-out can be seen in the lower right corner of the picture. Another dug-out, the size of the dug-outs is a sign that they most probably had an over-head cover of logs and earth. The main trench, it was not dug in a straight line but was criss-crossing like saw-tooth. A fighting position and the connecting trench to the mainline. The two-man foxhole can be barely bee seen on the edge of the forest, just to the left of the center of the photo. Another view of the main trench and a connecting trench that leads to a fighting position on the edge of the wood. Another view of the trench system, the one to the left goes to the big dug-out behind the bunker. Sketch of the trench system. Blown-up bunker (Marked as 2/3 on the map) Again there is a high seat on the ruins and another example how nature is reconquering lost ground. Blown-up Bunker (Marked as 2/4 on the map) Blown-up Bunker (Marked as 2/5 on the map) One can see how mighty the overhead concrete was. Bunker 2/5 seen from 2/4.
B-Werk Katzenkopf. (Marked as 3/1 on the map) (Copyrights of al the drawings: Martin Bettinger & Dieter Büren; "Der Westwall. Band 2.) The B-Werk "Katzenkopf" was restored as far as it was possible and can be visited. It is a two storey fortification with a stairways that descends a further two storeys and from which one tunnel departs to a well and another one, approximatively 75 meters long, leads to an offset armoured turret. I was well equiped with kitchen, sick-bay, showers and a machine room to provide the fort with eletricity. General layout. 1) Main Bunker 2) 20P7 Six loophole armoured machine-gun turret 3) Tunnel leading to the armoured turret 4) Tunnel leading to the well 5) Well There are people who say that it was intended to continue the well tunnel further on until reaching the second B-Werk at Irrel located a 1000 meters to the north-east, on the other side of the Nims river. It was also planned to dig a vertical tunnel and install a lift that would connect the Katzenkopf B-Wek with the railway tunnel that was exactly underneath the Bunker. The outbreak of the war prevented the realisation of those plans. Anyhow these seemed to have been very vague plans as the geology of the place would have made such a connection very difficult to realize. So in my eyes these theories are more urban legends then valid facts. Floorplan of the 1.st floor. 1) 20P7 Six loophole armoured machine-gun turret 2) Ready room 3) Observation room with 9OP9 observation cloche 4) Command center 5) Communications room 6) 21P7 Artillery observation turret 7) Artillery command room 8) Ready Room 9) Ready room 10) Corridor 11) Flamethrower 360 degree pivotable (destroyed) 12) Stair case 13) Ready room (destroyed) 14) Ready room (todays entrance) 15) Corridor (destroyed) 16) Main gas lock (destroyed) 17) Guard room (destroyed) 18) Ready room (destroyed) 19) Airfilter room (destroyed) 20) Work room for the automatic mortar (destroyed) 21) M19 5-cm automatic mortar (destroyed) 22) 2 Pitfalls (partly destroyed) 23) Flanking machine gun (destroyed) Floorplan of the 2.nd floor. 24) Ammo storage 25) Ammo storage 26) ? 27) Kitchen 28) Provisions store 29) Rest room 30) Corridor 31) Rest room 32) Flamethrower supply room 33) Staircase to the tunnels 34) Liquid fuel store (17.000 liter of diesel fuel) 35) Corridor 36) Toilet with wastewater pump 37) Washing room 38) First-aid room 39) Machine room 40) Ammo storage 41) Water store Cut A-A. To the sides of the drawing can be seen the emergency exits that lead from the rest rooms 29) & 31) to the outside. Outside view of the first floor as seen from the right . Air intake. The left hand entrance has survived, the right-hand entrance was destroyed when french engineers demolished the bunker. Note the protective loophole leading to the Ready room 14). The stair is not an original feature it was built after the pitfall had been filled up with rubble. "Rauchen verboten!" Damn health-nazisp-) Sketch of the pitfalls. Remnants of the right-hand pitfall.
The loophole in Ready room 14). Remnants of the original concrete ceiling in Ready room 14), the newly created entrance is in the back to the left. Ready room 2). Observation room 3). The former emplacement of the small observation cloche 90P9. Sketch of the small observation cloche 90P9. Command center 4) Communications room 5) Artillery command center 7). Airfilters. Communications equipment. Staircase 12), down to the second floor. The collapsed original concrete ceiling over the staircase. First-aid room 38). The collapsed ceiling in the First-aid room 38). Washing room with showers 37). "Licht aus!" = Switch of the lights! Toilets with waste water pump 36). Pump system to raise the waste water from the showers and toilets. Liquid fuel store 34).
Corridor 35) as seen from the Liquid fuel store 34). Another view of the Corridor 35). Breakthrough from Corridor 35) through the ceiling to the upper Corridor 15), this is not an original feature of the bunker but was added after the war Machine Room 39). Ammo storage 40). The inside of Ammo storage 40). View from the Corridor 35) through the Stair case 12) to the Corridor 30) and the room 26). Restroom 29) with transformed emergency exit. New emergency exit transformed to fulfill todays security standards. Originally the exit was the same as the one that can be seen in Restroom 31). Ammo storage 25). Ammo storage 24). Kitchen 27). Kitchen 27). Entrance to the Provisions store 28). Provisions store 28) with armoured plates that wait to be restored. Restroom 31). Restroom 31), with sleeping accomodations for 15 men, and the emergency exit in original configuration. Part of the collapsed ceiling in "Ausbaustärke B" = Strength B = 1,5 meter. Concrete reproduction of the 21P7 Artillery observation armoured tower Concrete reproduction of the 20P7 on top of the bunker. Concrete reproduction of the 20P7 accessible through the tunnel, located a 75 meter away from the main bunker. Note the emergency exit to the left.
Staircase to the tunnels 33). Tunnel to the 20P7 Six loophole armoured machine gun turret. Entrance to the turret groundfloor with flanking defense loophole. Flanking defense loophole detail from the outside. Flanking defense loophole, view from the inside. View into the tunnel from the flanking defense loophole. Entrance to the staircase. Airfilter underneath the staircase. Stairs to the first floor of the 20P7. First floor of the 20P7 with emergency exit. View into the shaft where the 20P7 used to be. Cross-section of a 20P7 six loophole armoured machinegun tower. Tunnel leading to the well. The end of the well tunnel. German Anti-Tank mine. Well room. Water pump in the well room.
Regelbau B 1/9 ( Marked on the map as 3/2) At the southern entrance of the railway tunnel that runs underneath the "Katzenkopf" B-Werk there is a bunker securing the tunnel. It is a "Regelbau B 1/9 Schartenstand" for a machine gun. It was built as part of the "Pionnierprogramm". The B 1/9 is quite remarkable in as far as the front as well as the roof of the combat shelter were not made of concrete but of 7P7 type armoured plates. Groundplan of the bunker. The bunker as seen from the front side, in the foreground is the combat shelter. View of the front with the remnant of one of the bolts that secured the front 7P7 plate. View into the combat shelter as seen from the ready room. View from the combat shelter through the ready room, with the flanking loophole on the right, into the gas lock,most of which has been destroyed. Detail of the flanking loophole. The walls have been split open by the sheer force of the explosion when french combat engineers destroyed the bunker in 1949. The bunker as seen from the back side, the entrance door into the gas lock is on the left, in the center can be seen the flanking loophole. Another view of the entrance. The roof that covered the gas lock entrance was displaced by five meters. In this cubicle was a wooden rack for the K98 Rifles. In the upper part of the left side of the wall one can see the bedding of the roof 7P7 armoured plate of the combat shelter. To the right one can see where the concrete ceiling of the ready room was blown off. The massive concrete ceiling rests six meters away from the bunker. The railway tunnel. As I had forgotten to bring a torch I did not venture deep into it, the floor was littered with all kind of **** and in some places there is stagnant water. Next time I will put on wellingtons, apparently there is one tube with communication cables, that comes down from the "B-Werk", in the middle of the tunnel. This huge chunk of concrete has been projected nearly 20 meters by the force of the blast. This view, taken from halfway inbetween the "Katzenkopf" (3/1) and the B 1/9 (3/2) shows the area where the second B-Werk called "Nimswerk" (3/3) lies. Though it can't bee seen it lies in the middle of the pic, a little below the meadow, inbetween the trees.
B-Werk "Nimswerk" (Marked as 3/3 on the map.) The second B-Werk in Irrel lies opposite the "Katzenkopf", above the Nims river, hence the name. It has also been destroyed by the french, but the lower floor is apparently completely intact just as in the "Katzenkopf" bunker. I am still looking for a groundplan but I'm quite confident that the "Nimswerk" was more or less identical to the "Katzenkopf" B-Werk. There were apparently three tunnels, one leading to an offset 7P7 turret, another one, meant to be either an entrance or emergency exit, had been drilled but the walls had not been reinforced by concrete. The existence of a third tunnel has been confirmed by several sources but no one can tell what it was used to, my educated guess would be a well tunnel as on the other side of the Nims. I was lucky to meet a Gentleman from a neighbouring village who could provide me with many informations, he was in the bunker just when the war was over, before the french had destroyed it. Until a few years ago it was possible to climb into the bunker and reach the intact lower floor, but the THW, voluntary civil protection service, have blocked all the possible entrances. So all one can see today is the concrete of the ceiling and a few bits of rubble. IMG]http://i179.photobucket.com/albums/w310/theholeinthedonut/Bunker/Westwall/Irrel%20Nims%20Werk/2008_06130031.jpg[/IMG] View of the "Katzenkopf" from the "Nimswerk". The "Nimswerk" is a few meters to the right of the place where the lawn has been mowed in the foreground, the "Katzenkopf" is to the left of the piece of tarred road one can see in the middle of the pic.
Bunker of an unknown type. (Marked on the map as 4/2) View from the Bunker towards the village of Bettel, which lies across the Our river in Luxembourg. MG-Schartenstand mit Panzerscharte, Regelbau 23. (Marked on the map as 4/3) Groundplan. cpyright by Kees Leijsen View of the "Eingangshof" = Entrance court of the bunker, to the left is the entrance into the gas lock, in the center is the loophole of the flanking defence. The destroyed gas lock. The inside of the flanking defence. Right hand wall of the combat shelter Left hand wall of the combat shelter. Outside view, taken from the combat shelter. "Bei geöffneter Scharte kein Licht anzünden" = Don't switch on a light if the loophole is opened. The center of the steel loophole plate where the loophole was, the loophole could be closed. Another detail shot of the Schartenplatte. One of the bolts that kept the armoured plate in place. The bedding of the armoured plate on the left hand side. View of the RB 23 from a dozen meters away, the entrance is to the right, the front with the loophole for the machine gun to the left The RB 23 as seen from the front. The remnants of the Schartenplate as seen from the outside. The left hand front corner of the bunker.
Site where a bunker of an unknown type used to be. (Marked on the map as 4/4) All traces of the bunker have been eradicated, this was done during the seventies and eighties. The concrete ruins were demolished by caterpillars with huge pickhammers mounted instead of a shovel head. Apparently there have been 58 bunkers completely destroyed on the territory of the Körperich township. The hill in the background is on Luxembourgish territory, bunker 4/2 is a little to the left, more or less a hundred meters behind the hedgerow you can see in the middle left side of the pic. Site where a bunker of an unknown type used to be. (Marked on the map as 4/5) Another completely destroyed bunker, parts of it should be underground though, the remnants of the bunker have been "Übererdet" = covered with soil. The bunker used to be where there is the copse of trees, the pic has been taken from the site where the bunker 4/4 used to be. Site where a bunker of an unknown type used to be. (Marked on the map as 4/6) Another one that has been completely destroyed, there is nothing left. The bunker used to be a dozen meters behind the pile of rubble (The remnants of the Körperich public swimming pool ). Site where a bunker of an unknown type used to be. (Marked on the map as 4/7) The bunker was ony a fwew meters away from the fence, on the crest dominating the little valley. Apparently some of the remnants have been left in place and could be found under a cover of soil.
Bunker of an unknown type. (Marked on the map as 4/8) This site has been used as a waste dump and land fill. As only the front of the bunker is free from soil and stones I was not able to tell what type it was. I'm sure though that it had a fighting compartment, most probably with a machine gun as main armament, it does not seem to have had a "Schartenplatte" armoured plate. My educated guess would be that it is possibly a late model RB 23 MG-Schartenstand. It is, from a strategical point of view, perfectly located, dominating the whole side valley that runs down to the Our river. Site where a bunker of an unknown type used to be. (Marked on the map as 4/9) Another bunker that has completely disappeared.
Geopraphical location. The Westwall ran from Kleve at the Dutch border south through the Eifel region, along the Our and Sauer rivers at the Luxembourgish border, past the historical city of Trier and met the Saar river near Konz. It followed the Saar until it reached the city of Saarbrücken, crossed the Palatinate region to the Rhine, which course it followed to end at the Swiss border. It covered a length of 630 kilometers and was made of +/- 17.000. bunkers, 9.000. of those were built in the years 1938 and 1939 alone. Plans were made to build a total of 22.000. bunkers which should have been finished by the year 1952! The defensive system consisted not only of bunkers but also of underground galleries and anti-tank obstacles, dragonteeth, wooden poles and ditches filled with water. Development of the Westwall from 1936 until 1940. The development of the Siegfriedline was anything but homogenous and was often influenced by political developments, one also has to keep in mind that it was meant to have a propaganda value, maybe as much as a strategical value. There were different phases of building, the Westwall was created in steps called "Programme". First fortifications were built in 1936 Grenzwacht-Programm or Pionier Programm, 1937-1938. Limes-Programm, 1938. Aachen-Saar-Programm, 1939. Geldern-Stellung Brüggen-Kleve, in 1939 and 1940. Luftverteidigungszone West, in 1938 Neubau-Programm, 1939 Kriegsregelbauten, 1939-1944 After the reoccupation of the "Saarland" region in 1936 the Wehrmacht began with the construction of the first, dispersed bunkers, mainly along strategical roads and Saar bridges, along the Rhine at strategic crossing points, as well as in some strategic valley crossings in the Black Forest region. The first fortifications were restricted to the area inbetween the Mosel and Rhine river and along the upper course of the river Rhine. The only strong and connected "Stellung" is built to the south of Karlsruhe, called the "Ettlinger Riegel". All in all 206 Bunkers were built in 1936, they were located inbetween Irrel to the north and the Swiss border to the south. It is interesting that all those projects were shrouded in secrecy as the germans feared retaliation of the allied for this obvious breach of the Versailles treaty. Apparently all the military personnel involved in planning and construction wore civilian clothing and no military vehicles were used. In 1937 work was continued to implement the fortifications of the historical invading gaps of the Moselle river valley near Trier and the Rhine valley to the west of Karlsruhe, the so-called "Weissenburg-Gap". Inbetween those gravity centers a line of less stronger fortifications was planned. This was the so called Pionier-Programm. It was planned to built 11 "Werkgruppen" -Forts in the so-called "Ausbaustuffe A" (strongest type of fortifications, I will come back to the subject of "Ausbaustuffen" later on.). The "Werke" were never built in Class-A though but were all done in Class-B, the Katzenkopf and Nimswerk in Irrel are two of the eleven Forts. As it was clear to the planners that those fortifications would need years to be completed they built a line of weak fortifications, close to the borders along the Saar river and in the Palatinate region to give a certain degree of protection to the construction sites of the main defensive line, farther away from the border with France. In 1938 the Pionier-Programm was extended to create a third system of fortificated positions along the lower Rhine and into the Eifel region, thus prolonging the fortifications from Trier up to the north until reaching the Belgium-Dutch border. The worsening political situation, in extenso the partly mobilization of the Tchechoslovakian army, brought an end to the Pionier-Programm because it took to long to build those technically complex bunkers. The Regelbauten The "Regelbauten" were standardized plans and norms for building bunkers, they were in an numerical order. Each program had it's own Regelbauten allthough sometimes it was just a variation with only slight transformations to the Regelbau of the previous program. As an example a RB23 of the "Limes Programm" was more or less the same as the RB 23 of the "Pionier-Program" but the armoured plate loophole plate was replaced by a concrete loophole. Also one has to be aware that there was a certain leeway in adapting the RB's to the terrain or the specific needs of a position. So there can be variations in the layout of Bunkers of the same Regelbau. There were 53 different Regelbau types for the Pionier-Programm and 40 different Regelbau types for the Limes-Programm In may 1938 it was replaced by the Limes-Programm. This was a simplified less sophisticated program that could be implemented on a faster scale by the "Organisation Todt", using less resources then the technically more advanced previous programs. As an example there were nearly no armoured paltes and no armoured turrets used in the "Regelbauten" of the Limes-Programm. The OT took over the construction works from the "Festungspionierstäbe" = Fortress Engineer HQ, who only were in charge of the reception of the finished constructions. In the second half of 1938 the germans began with the works on the "Luftverteidigungszone West" = air defense zone west. The LVZ was a line of AA bunkers, protected by dragonteeth and machine gun bunkers that stretched behind the Westwall line. There were 60 batteries of heavy and light Flak planned inbetween Jülich and Speyer. The construction was again under the responsibility of OT, which, together with the Luftwaffe, had drawn plans for 7 bunkertypes. Most of those were variations and transformations of "Limes-Regelbauten". A unique feature of the LVZ bunkers was that all the bunkers had running water, the bunkers were supplied with water from central wells and water tanks via a system of underground water pipes. Single bunkers that were too far away to be connected with pipes had their own wells. Another feature of the LVZ was that it was also planned and built to use the heavy Flak in an anti-tank role, if then main line would have been breached. The great number of Regelbauten called for a simplification, so in 1939 the "Neubau-Programm" was started, there were fewer Regelbauten in this program with a higher degree of standardization and some allowances for technical progress and advancements in civil engineering techniques made in the previous years. Slight variations of the same Regelbau type were also standardized and defined ( e.g. with or without flanking defense, with or with out a periscope, with or with out armoured observation cuppola....) Ausbaustärken. The Ausbaustärke (Building strength) was the standardized norm for the strength of the concrete walls and ceilings of the bunkers, they were defined by ldecreasing strength with letters from A to D. "Ausbaustärke A" was secure against repeated direct hits with 52 cm artillery, 1800kg bomb on the ceiling and 500kg bomb on the walls. The ceilings and the walls were 3,5 meters thick. Only 2% of the bunkers were built in Ausbaustärke A. "Ausbaustärke B neu" was secure against repeated direct hits with 21 cm artillery, 500kg bombs on the ceiling and 100kg bomb on the walls. The strenngtz of the walls and ceilings was 2 meters. Only 11% of the bunkers had that strength. "Ausbaustärke B alt" was secure against repeated direct hits from 15 cm artillery and single hits from 21 cm artillery. The walls and ceilings were 1,5 meters thick. "Ausbaustärke B 1" could withstanmd repeated direct hits of 10,5 cm artillery. The thickness of the concrete was 0,8 to 1,0 meters. B1 and B alt together made out 82% of the Westwall bunkers. "Ausbaustärke C" was secure against shrapnell and to 500 shot concentrated MG fire to one point from a distance of 250 meters. The walls and ceilings were 0,6 meters strong. Only 3% of all the bunklers were of C-strength. "Ausbaustärke D" was secure against shrapnell and grazing fire from machine guns. The concrete was 0,3 meters strong. Only 2% of all the Westwall bunkers was in Ausbaustärke D After the beginning of the war and when France surrendered in autumn 1940 all work on the Westwall was stopped. To take into account the worsening situation regarding building materials and resources a new series of Regelbauten, the "Kriegsregelbauten" was introduced, they were based on the "Neubau-Programm" but with transformation and changes to reduce the amount of building materials needed. The armament of the Westwall Generally speaking the weapons used in the Westwall were quite weak and obsolete. The main machine gun type was the old Mg 08 and MG 08/15 of WW1 vintage. There were some MG 34 as well as later one some tzech Mg 26 and sMG 37(t). They were mostly mounted on a steel or concrete desk and could be retracted so the loophole could be closed. Only a few had spherical armoured mounts that left no space inbetween thne barrel and the loophole. The same problems went for AT weapons, most of the Schartenstände for the Pak were equipped wit mounts where normal 3,7 cm Pak 35/36 could be mounted after the wheels had been removed. The Pak fired through an unprotected opening, a few were protected through armoured plates with a firing port. After the war with Czechia the Wehrmacht was left with many high quality fortress weapons they took over, many of them were the 4,7cm Festungspak 36 (t) that were added to the Westwall bunkers, they had high armour piercing capabilities and were bedded in an armoured spherical mount. The artillery bunkers were built so normal artillery pieces could be entered and taken out quickly. In the main line those were mostly "7,5 cm Infanteriegeschütz 16" for direct fire as well as some few "8,8 cm Flak" in the AT role. 10 to 15 km to the back of the main defense line there were fortified concrete firing positions for the 10,5 "Leichte Feldhaubitze 18". The heavy 15cm artillery was supposed to fire from open field positions with bunkers provided for personnel and ammunition storage. There were only a few B-Werke that were equipped with modern dedicated fortress weapons like the "5cm Maschinengranatwerfer M19" automatic mortar or the "Festungsnahkampfgerät FN" flamethrower. The same goes for the Armoured Machine Gun turrets, either six loophole 20P7 or 3 loophole 407P9. Only very few were built into smaller bunkers then B-Werke.
