Vasco Da Gama
Well-Known Member
There are some things you just do not expect to find in the UK. Pictured are 2 cases which turned up recently which I have very little information about. The markings on the base are very clear, American Armament Corporation, SA Gun ( I take this to be semi-automatic). From the markings on the primer I suspect a date of 1942, which is late for my understanding. The only reference I can find is for a developmental aircraft gun in the 1930s. Case length is 203mm, Rim 54mm and mouth 37mm. The very slight groove above the rim is 6mm high. They do look very much like the French Tube-Cannon (37x200) but the rim is smaller, 54mm rather than 57.5mm. The groove above the rim is a likeness of the USA 37mm M17 antiaircraft cases 223SR, but they have a smaller rim 51.1mm. I would be very glad if anybody could educate me as to what project these cases came from.