Guns › Hispano-Suiza HS.404Hispano Mk IHispano Mk IHispano Mk IModification ofHispano-Suiza HS.404Caliber20 mmService193119321933193419351936193719381939194019411942194319441945United Kingdom · Western Europe≈ Sep 1940 – 29 Nov 1943Aircraft 1193119321933193419351936193719381939194019411942194319441945Whirlwind Mk I112Jan 1941 – 29 Nov 1943