At the beginning of WW2 the French Army had in service a small number of 37 mm Schneider M1930 automatic AA guns, which were apparently allocated to the defence of Paris. The ammo fired a 750 g shell at 800 m/s, and the gun used an 8-round strip feed and fired at 175 rpm.

I have a note in my files that someone, years ago, posted on a forum that he had a case for this ammo and that it was rimmed and 300 mm long. Can anyone confirm this and tell me the rim and base diameters? An illustration of the round would be even better!

Thanks for any help.