Bidspirit auction | British 3-Inch 20 Cwt Mark

British 3-Inch 20 Cwt Mark V Brass Anti-Aircraft Shell Casing dated 1937 - This item is a British military brass shell casing designed for the 3-inch 20 cwt anti-aircraft gun, a standard piece of ordnance used during the inter-war period and the Second World War. The casing is constructed from heavy-gauge brass and is in spent condition. The base features several clear struck markings including the gun specification 3 IN 20 CWT and the Mark V model designation. The manufacturer code R. L. identifies the piece as having been produced at the Royal Laboratories, Woolwich Arsenal. It is dated 1937 and carries the letters C F, indicating it was originally intended for a full charge of Cordite propellant. The British War Department broad arrow pheon is present, along with the letters A M, which signifies service with the Air Ministry for anti-aircraft defence. The base has a central threaded hole where the primer was originally seated.