How many of the first tanks carrying the QF 6-pounder 6 cwt Hotchkiss were built?
QF 6-pounder 6 cwt Hotchkiss: The Ordnance QF 6-pounder 6 cwt Hotchkiss Mk I and Mk II was a shortened version of the original QF 6 pounder Hotchkiss naval gun, and was developed specifically for use in the sponsons of the later Marks of British tanks in World War I, from Mark IV onwards. Mark IV tank:  A total of 1,220 were built: 420 "Males", 595 "Females" and 205 Tank Tenders (unarmed vehicles used to carry supplies), which made it the most numerous British tank of the War.
1,220