French SA Cartridge (drawing)

I found this in a Small Arms Committee Minute No. 1542, dated December 13th, 1935.

The text mentions that the bullet diameter is .307 inch and that the round is similar “to a light aluminium alloy case received from Maribini-Aviation, Paris. (Report No MET 3257)”.

The headstamp is noted as being TE 4 J 31