1941 WW2 TG & Co Mk III Officers Prismatic Military Marching Compass

This fine looking device is an original 1941 WW2 TG & Co Mk III Officers Prismatic Military Marching Compass.

The rear of the compass is marked:

Condition:

• Made from brass and over lacquered in black, it is in fairly good cosmetic but non-working condition: (doesn't appear to find North).
• There is no sighting glass with sighting line but I'm not sure if there is anything else missing.
• There are scuffs and blemishes on the surface where the black paint has rubbed away.
• Whilst the compass is intact, and still contains the original fluid damped disc, the inside is cloudy and the numbers, (Divisions: 360 deg., clockwise), on the mother of pearl compass card dial are difficult to read.
• There are compass points engraved on the outside dial with a turning dial held in place by a brass screw, which I am unable to turn.
  

T.G. Co.Ltd is better known as The Gramophone Company which was the trademark for EMI (Electric & Musical Industries). The abbreviation, {T.G.Co. Ltd}, was only used by EMI during WW2 as they diverted their normal business activities to the war effort. 

The B in front of the serial number indicates that the compass was made by the British compass maker F. Barker & Son.

A lovely little collectible for the