Came across the pictures at the Bundesarchiv website showing a tank resembling an A7V, but not quite it.
Allegedly an A7V modified by a small tank unit in one of the Freikorps supporting the German goverment in 1919. The fixed "turret" seems to have been removed and replaced by two small cupolas(?) and the front heavily modified with two small machinegun turrets. Possibly, the rear have been modified the same way. Not something you just to overnight with a hammer and a blowtorch, so assumingly a manufacturer of some kind have been involved?
Edited by cbo, 28 December 2016 - 1106 AM.