British, WW2, 20MM Oerlikon Brass Shell Case, Dated 1944, Headstamped O.e.Z, Made by S.T. (Royal Ordnance Factory, Steaton)

*British, WW2, 20MM Oerlikon Brass Shell Case, Dated 1944, Headstamped O.e.Z, Made by S.T. (Royal Ordnance Factory, Steaton)*

Marked:
O.e Z, S.T., 1944
O.E.Z – Oerlikon monogram “Oe” with N/C – nitrocellulose propellant “Z”
S.T. Royal Ordnance Factory, Steaton

Approximate Measurements: 2cm base diameter, 10.9cm height

Originally designed for the 20mm Oerlikon gun and other 20mm automatic cannons, these casings were widely used by both British and American forces during WW2. The 20mm Oerlikon gun, a highly effective anti-aircraft and ship defense weapon, played a crucial role in the air and naval battles. These shell casings were once part of the ammunition fired in defense of warships, aircraft, and ground installations, making them a vital piece of wartime history.

The OeZ marking was used to differentiate the semi-rimmed Oerlikon rounds from the similar looking (but not interchangeable) 20m Hispano. In British service, a “Z” stamped on the base of a case 20mm or below in caliber indicates that the case is loaded with nitrocellulose flake powder. This is opposed to the typical British Cordite “spaghetti” rod-type propellant.

*Condition*
Good used condition. Please see photographs as part of the condition report.

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