The tuna case with screw back and original solid lugs measures 35.5mm across and is signed on the back hard to make out, but its there. A rare piece of history, see pics for condition, its seen some military service in its time. The markings on the case back, C.
D, stands for "Combined Operations Stores Depot". The Combined Operations Command was established in 1940 by Winston Churchill immediately after the evacuation of Dunkirk and its sole objective was to undertake offensive operations against the enemy via a combination of land, sea and air for._gsrx_vers_1326 GS 8.4.1 (1326).