20 x 102 M51A1B1 Dummy
Markings:
Fuze:
No fuze
Projectile:
Engraved:
20MM DUMMY
M51A1B1
Drive-band:
blank
Casing:
20MM, M51A1B1
DUMMY G+W-1-1-N-71 (G+W : Gulf & Western Industries, Inc, USA)
Headstamp:
blank
The M51A1B1 has a different bottom as the M51A1, as it is missing it’s primer.
The ‘simulated’ primer is replaced by a small dimple on this A1B1 model.