I recently acquired this item and I think I know that it is a developing system for 80mm film. I has several discs of various sizes, tanks of various sizes, film loader of some kind, and a full instruction book and illustration book (both in German) all packed away neatly in a fitted wood box with an APO return address and overpainted OD green. All the parts are a brown bakelite type material. It appears to be complete except for the thermometer (I recognized that word) and the supply of cloth rags. Anybody know what the heck it really is?