WW2 1942 British Dated 20mm Oerikon Ammunition Shell Casing mirror When worn the haversack was

When worn the haversack was worn high on the chest and was connected to the facepiece via a corrugated rubber tube

Excellent display or restoration piece

who was a chemist and inventor

enhancing operational efficiency

WW2 1942 British Dated 20mm Oerikon Ammunition Shell Casing mirror When worn the haversack wasThis particular 20mm casing was manufactured in Royal Ordnance Factory, Blackpool, Worcester (ROF20) 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