20mm British TP round Oerlikon KAD anti-aircraft 20x139mm inert shell ammo
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Inert 20mm Oerlikon (for British export) round used in the 20mm Oerlikon KAD. This 20x139mm casing is made of steel and is in good condition. The 20mm Oerlikon KAD is a gas/blowback autocannon which was mainly used in the anti-aircraft roles. It was the British designation for the HS.820.