 The cumulative effect of these delays resulted in the production of only a small number of Mk VIIs ; estimates place the final total produced to be between 100 and 177 . The name ' Tetrarch ' 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 . 
 The cumulative effect of these delays resulted in the production of only a small number of Mk VIIs ; estimates place the final total produced to be between 100 and 177 . The name ' Tetrarch ' was given to the Mk VII , on 22 September 1941 , on the orders of the War Office . The last of the tanks <a href='uninflect' title='1'><mark>were</mark></a> built in the first quarter of 1942 and delivered at the end of the year . 
Da cumulative effect of these delays resulted in tdaproduction of only a small number of Mk VIIs ; estimates place thdainal total produced to b between 100 and 177 . Thedame ' Tetrarch ' was given to the daVII , on 22 September 1941 , on the orders of the War Office . The lda of the tanks was built in the first quarter of 1942 and delivered at the end of the yeda.