 The cumulative effect of these delays resulted in the production of only a small number of Mk <unk> ; estimates place the final total produced to be between 100 and 177 . The name ' <unk> ' was given to the Mk VII , on 22 September 1941 , on the orders of the War Office . The last of the tanks were built in the first quarter of 1942 and delivered at the end of the year . 
