British Mark V

he Mark V was, at first, intended to be a completely new design of tank, of which a wooden mock-up had been completed; however, when the new engine and transmission originally planned for the Mark IV became available in December 1917, the first, more advanced Mark V design was abandoned to avoid disrupting production. The designation "Mark V" was switched to an improved version of the Mark IV, equipped with the new systems. The original design of the Mark IV was to have been a large improvement on the Mark III, but had been scaled back due to technical delays.
you can buy this model at Turbosquid.