20mm Round Assembled
Shell case, round, (fuse removed)
20mm Round Disassembled
Shell case, round, fuse
Rearview of the 20mm shell case, '20' is embossed into the rear
20mm Long Barrel Cannon from crashed A6M3
20mm round (bent) in breech
20mm shell case comparison
20mm short barrel shell case (held)
20mm long barrel shell (in breech)