British 1941 Dated 40 MM Shell Casing – Griffin Militaria

Table of handgun and rifle cartridges - Wikipedia

The Assault Gun Rides Again! – UK Land Power

WW2 1944 British Dated 20mm Oerikon Ammunition Shell Casing in

WW2 1942 British Dated 20mm Oerlikon Ammunition Shell Casing in

Sporting & Militaria with Antiques and Collectors' Items

Orders, Decorations, Medals and Militaria (23 Apr 23) by Noonans

List of military headstamps - Wikipedia

Militaria in the 4th September 2013 antique auction

Cold War British SPG Prototypes Archives - Tank Encyclopedia

Arms, Armour, Militaria and Ethnographica Sale Medals

WW2 British 40mm shell case

Vintage 1945 WWII Spent Brass Shell Casing, 105 MM.M14, 14 1/2

Militaria in the 4th September 2013 antique auction