Who knows this differential and this transmission

Hello together, I am just restoring a historical, self-propelled band saw with wood splitter, built in 1950, driven by a Deutz stationary motor. Who likes to look at what looks like – I have a kind of restoration diary with all kinds of pictures in the Deutz forum. Unfortunately (among other things) a thru-axle in the rear axle of the machine is cut off directly in the differential and has to be replaced. It was a post-war period, after all… There were suspensions of cars, of trucks and sometimes even probably old MG greases installed (I heard). That’s why I don’t have any information about the built-in parts now, but I need them for the purchase of spare parts. In particular I need information about the thru axle and the gearbox. I put here all kinds of pictures of various components. Maybe someone here can get the Tei All I know so far is that Opel Blitz and Willys Jeep are leaving. I would be very grateful about any information! Greetings, Hans