Help with indification of a telescope

From a neighboor in my street I got a little present: an old telescope. This telescope is propably a telescope from WW2. I have been looking on the internet if there is something about this telescope I found only other versions of this teleschope. Now I wonder where this telescope has been used for.
There is some inscription on the telescope I think that is about the manufacterer. This is the text:

Telescope, Sighting N° 38. MK. I.
O. S. 73 G.A.
A.R.I.C. 1942
N° 375

The first line is the brand or type of the telescope I think. The second line I don't understand, the tird line I don't understand and the last line must be somting like a number of production.

What do you think? Where is this thing made for and were is it used. I live in the Netherlands and I think it also must be found here in the Netherlands.

I also made some pictures This tile that the telescope is laying on is about 1 meter. I think the dimensions of the object are 60 cm by 6 cm

 

British.

WWII 1942 British Army Brass Telescope Sighting no. 38 MK I | eBay

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Yes tank you for your reaction. I also found that one. I know that it is brittish but were is it used. Is it used on a vessel a tank maybe in the field. I dont think it is used in the field that would not be very logical, because this thing is not so light.

 

Is there a crossed-out stamp near the eyepiece which says "Variable Power Telescope, No2 MkII, Periscopic Prisim Co Ltd, London" ?

A question about these No38 scopes was raised recently on another forum. The consensus was that although there is little information available online, the No38 appears to be a repurpose/rebuild of the WW1 era No2 scope which was used on Scott-Vickers fire control systems on warships. What it was used for in WW2 I do not know.

 

On ships, yes. But also by people like artillery spotters and those who updated maps for artillery and general use (whatever they were called). Every yard of ground had to be plotted so that troops knew what was ahead and around them, and so that artillery could be fired accurately. This was a tedious and forgotten chore. Trained men had to carefully plot each on a grid, taking compass bearings from various directions and feeding this information back to those who updated and distributed the maps.

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I don't really know if these letters are marked near the eyepeace. I have seen something starting with London but it is also painted so very hard so see these letters. Later this week I will search for it.