Aircraft gauges and hello.

Firstly may I say hello and introduce myself for while I've previously just been a visitor mainly interested in German aircraft. Now something I have recently obtained requires some information from you experts. Thank you.

On my travels of the northwest flea markets I came across these two gauges, obviously from an aircraft but which one/ones?

Gauges pictures by Airsniper - Photobucket

The altimeter has the following markings/serial no on the dial face:

' MK X III C no 9556/40'

'S S & S Ltd. LONDON'.

On the rear: 'REF NO. 6A/445'

There is a brass cover slipped over the tube at the rear of the altimeter.

The other pressure gauge is marked on a label at the rear:

'PRESSURE GAUGE
TYPE NO KPB-01 01K
SERIAL NO. BP124'

On the dial face in green is marked:
'DIFFERENTIAL PRESSURE GAUGE.
KELVIN HUGHES
KPB 101K'

Any information on these gauges, especially what type of aircraft they came from, would be most welcomed.

Thank you.

ATB
Ian

 

Could anyone suggest were I may find out further information on these gauges?

 

have a trawl through these ian.. Google Image Result for http://www.aviation-antiques.com/images/1-5-i-n-2.jpg