Total write offs of the British Tank Corps in the Normandy in June 1944 146 Tanks, July 231 Tanks, August 834 Tanks -> WO 165/136, Half yearly report on the Progress of the Royal Armored Corps, No 10, 1 July to 31 December 1944. Note the distortion of the losses over the months, most likely because of the workload of the repair shops being only able to investigate the heavily damaged tanks after the fighting lessened after the battle at Falaise, still 1211 total write offs for this three months. This number doesnt include ofc the knocked out and repaired tanks, all in all the germans claimed for the whole normandy front 3663 knocked out tanks, if you include the US Sherman losses alone in these three months (899 M4s, Office of the Chief of Military History, Dept of the Army, Washington D.C. 1953 ) to the british losses you get 2110 losses, US Light Tanks, TDs, SPGs not included. Hence the difference since knocked out tanks, depending on the source where up to 50% repairable, battlefield possession implied. So in all there is nothing wrong with the german number more like they are too low (Zetterling, Normandy 44, p. 75 quote 33).