However, in December 1917, when the desired new engine and transmission became available, this design was abandoned and the designation switched to an improved version of the Mark IV, in fact a Mark IV as it was originally intended: more power (150 bhp) with a new Ricardo engine, improved steering mechanism and epicyclical transmission, only one driver was needed.

A second cupola, with hinged sides, was added, towards the rear of the tank, so that the crew could attach the unditching gear without leaving the vehicle.

[citation needed] An unexpected opportunity to obtain such tanks came when the Northwestern Army under Yudenich was overpowered by the Soviets and retreated towards Estonia.

770 on 26 November 1919, Captain Hans Vanaveski was ordered to organize a training unit under the name of Tank Class.

[2] The ultimate fate of these four Estonian Mark V Composite tanks is believed to have been being melted down somewhere in the Third Reich into armour steel for the German total war effort.