Mysterious offering

I was offered this little puppy yesterday. It has a F. Deckel-Munchen Compur shutter and a Schneider F 2.9 50mm lens but there is no mention of camera manufacturer anywhere on the body. I have seen several other cameras on the net with this shutter, but most are a bellows set up. This is a tiny affair. It has a very small viewfinder mounted on top of the body. I have done some cursory investigation, but I can't find anything further out about it. Nor can I deduce what size film it would take (even if it were still available). I've enclosed 2 further images of it. The first has the top removed and one of the reels next to a standard 120 reel, which as you can see is quite a bit bigger. In the second image I have sat it next to my 'blad, just so you can get an idea of just how dainty this little fella is. If anyone has any further information they could impart I would be very appreciative. I am quite a collector of tat, and would like to add this to my collection, but if I can't get any film for it, then I may have to say thanks, but no thanks.