Attached is a picture of 3 AP shell (shot?) for the 30 mm ADEN HV Cannon. The unpainted shot is date stamped, RG 54 and the middle black one RG 53 which is about right according to Labbett/Brown, British 30mm and 30/20mm Ammunition. However the one on the right is stamped RG 44, this to me seems far to early for this projectile. Does anyone have any information on this.

