A military small & medium caliber ammunition collection

20 x 139mm HS820 United States

20 x 139mm HS820 Dummy  United States  profile view.20 x 139mm HS820 Dummy  United States  head view.

Details

TypeDummy
Projectilesteel, aluminum windscreen, blue, 1 copper driving band Projectile Markings: (white ink) INERT DUMMY LC-SP-1567 (black ink) ZDP 1-01-69-M212E1
Casesteel, roll crimp, zinc chromate plated, 4 holes Markings: (black ink) 20MM FAT 220E1 RNO-4-3-69
Primerinert, flat, plastic
Headstamp[none]
NotesPlastic insert visible through holes in case.