The Tank Mark III (1917) was derived from the Mark I with enhanced armor and modified sponsons.
Vickers Medium Tank Mk.III E1 (Original art by Hubert Cance)
Infantry Tank Mk.III, Valentine - Tank Encyclopedia
Cruiser Mk. III - Global wiki. Wargaming.net
Tank Mark III
Crusader III – Cruiser Tank – Mk VI
Panzerserra Bunker- Military Scale Models in 1/35 scale: Vickers Medium Mark II** (stars) tank - case report
Light Tank Mark II A - Two-Man Light Tank of the Early Thirties (Watch)
Tank Mark III
Vickers Light Tank Mk III - Nevington War Museum
Infantry Tank Mk.IV Churchill Mk.III
Churchill Mark III* Tank Repairs Making Headway - The Tank Museum
Vickers Medium Mark III Tank - Copplestone Castings
Developed by extensively upgrading two prototype M1931 Christie tanks purchased by the British Army in 1936. The vehicle was designed to be a fast, lightly-armored breakthrough tank. The modified design was deemed successful and became the basis for other cruiser tanks. Sixty-five vehicles of this type were built and saw combat in France and North Africa in 1940 and 1941.
Cruiser Mk III (World of Tanks)
Surviving British Mark II Female Tank- Restored WW1 Tank Photos