class: Recon description: The Light Tank Mk VII (A17), also known as the Tetrarch, was a British light tank produced by Vickers-Armstrongs in the late 1930s and used during the Second World War. The Tetrarch was the latest in the line of light tanks built by the company for the British Army. They were declared obsolete in 1946. introduced: 1938 manufacturer: Vickers-Armstrongs origin: UK price: 8 role: Airborne Light Tank variants: A17 Light Tank Mk VII Tetrarch: {}