This is a placeholder for what is intended to become a series of ammunition group photos. It shows World War II era Rheinmetall-Borsig cartridges intended for automatic anti-aircraft cannon, in 20 x 138B, 30 x 184B, 37 x 264B, 50 x 346B, and 55 x 450B (repA) calibres. It also reveals how much this company liked belted cases.