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20 x 110mm USN United States

20 x 110mm USN Inert United States NECO 12 52 20MM-MK.5. MOD.0 profile view.20 x 110mm USN Inert United States NECO 12 52 20MM-MK.5. MOD.0 head view.

Details

TypeInert
Projectilesteel, brown, 1 copper driving band Projectile Markings: (white ink) 20MM (DUMMY) LOT-3 FOR GUN MK 12 AER-53 Driving Band Markings: 20-MM MK.11-0-LOT D 18
Casesteel, choke crimp, cadmium plated
Primerpercussion, flat, brass, 3-stake crimp, black
HeadstampNECO 12 52 20MM-MK.5. MOD.0
NotesInert case filler and inert primer.