The Vickers 6 Ton or Vickers Mk E was a British Tank built in 1928. It's design was not purchased by the British Army so Vickers sold the design to many countries including Russia, Greece, Poland, Bolivia, Siam, Finland, Portugal, China and Bulgaria. The Version 'F' mounted a single two man turret with a short barrel 47mm and a single machine gun as well as a block on the rear of the turret. The Version F was bought, amongst others, by China and used in the war against Japan.