I managed to get out of the office today and stumbled across a really cool bunker complex (can't say where). While prowling around I found a casing on the ground. It is aluminum with a steel rim and base. Unfortunately I can't tell if it is Berdan or Boxer primed because the case mouth was crushed in. There are also no headstamp markings. It almost looks like a .30 Carbine case except for the double rim. This cartridge is one used by the French military sometime between the 1950s and the 1970s (as far as I can go on that subject). Anyone care to help me out on this one? I will try to provide better pictures based on the responses I get back.