WW2 1944 British Dated 20mm Oerikon Ammunition Shell Casing in Ammunition
This particular 20mm casing was manufactured in Raleigh Cycle Co., Ltd., Nottingham, England, UK The “OeZ” marking means “Oerlikon, Loaded with Nitrocellulose powder”. This 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.
275 Ammunition for Sale in Stockport- Gunstar
WW2 1944 British Dated 20mm Oerikon Ammunition Shell Casing in Ammunition
USA 20 mm/70 (0.79) Oerlikon Marks 1, 2, 3 and 4 - NavWeaps
50 caliber bullet casing - Other Equipment - The Great War (1914-1918) Forum
Heavy Ordnance Catalog
The use of captured German 20-mm anti-aircraft machine guns
Is there a difference in the 20mm ammunition used in WW2 and that used in 20mm Vulcan cannon mounted in many of our current fighter jets? - Quora
WW2 Canadian Dated 20mm Ammunition Shell Casing
WW2 1944 British Oerlikon 20mm Ammunition Shell Casing in Ammunition
metric.htm