More info...
here is a link to a picture at the Australian War Memorial of Mephisto:
http://cas.awm.gov.au/item/E02876
DescriptionA German tank captured by the 26th Battalion, at Monument Wood, near Villers-Bretonneux, in an operation on 14 July 1918. The photograph was taken after the tank, known as Mephisto, had been salvaged and handed over to the Australian War Records Section for despatch to Australia.
http://cas.awm.gov.au/item/E02877
DescriptionA German tank captured by the 26th Battalion at Monument Wood near Villers-Bretonneux on 14 July 1918 and subsequently salvaged for the Australian War Museum by the 5th British Brigade of Tanks. An A7V Kampfwagen. This tank was known as Mephisto.
http://cas.awm.gov.au/item/P01445.001
DescriptionProbably BOIS L'ABBAYE, FRANCE, C.1918-07. RIGHT HAND VIEW OF THE A7V KAMPFWAGEN (TANK) NO. 506, KNOWN AS MEPHISTO. FIRST USED 1918-03-21 ON THE WESTERN FRONT, IT WAS CAPTURED 1918-07-14 BY THE 26TH BATTALION (COMPOSED LARGELY OF QUEENSLANDERS) AT MONUMENT WOOD, 500 YARDS SOUTH OF VILLERS BRETONNEUX, WHERE IT HAD LAIN FOR THREE MONTHS AFTER FALLING INTO A SHELL CRATER. IT WAS SALVAGED 1918-07-23 BY 1ST GUN CARRIER COMPANY, 5TH TANK BRIGADE, ROYAL ARMOURED CORPS, TOWED TO THE DEMONSTRATION GROUND AT VAUX-EN-AMIENOIS AND TRANSPORTED TO AUSTRALIA, LANDED BRISBANE 1919-06 WHERE IT IS STILL (1991) ON LOAN TO THE QUEENSLAND MUSEUM FROM THE AUSTRALIAN WAR MEMORIAL. ITS NORDENFELT 57 MM GUN CAN BE SEEN WITH TOWING CABLES LOOPED AROUND IT. (DONOR J. FROST)
John