Today at a flea market I bought a small percussion cap tin. It is square in shape with curved edges, and is hinged at the rear. It meansures 2.768" across by 2.039 high by 0.795 deep. It is painted olive drab with yellow lettering on the lid. This reads:
10-PERCUSSION CAPS MK. III
B.H. LOT NO._________________/43
CAPS FILLED I.C.I. KYNOCH.___/43
(Lines are only present to keep lettering correctly spaced)
On the rear edge of the lid, just above the hinges, there is, also in yellow, a tiny marking of “MB.6”. The “M” and “B” are combined so the downwards part of the M on the right is the downwards part on the rear of the B
What would these “percussion caps” this held be? My only idea was detonators for a certain type of British Grenade (no idea which) that used a blank cartridge made from a .303 case cut off around halfway down the case and closed with a star crimp as a detonator. Lots of these tins have turned up for sale at arms fairs in the UK recently. Does anyone know exactly what this held?