I used to have one of these (a Model 111 if I remember correctly) when I was at University in the sixties. Its claim to fame was that it used 39mm screw lenses but gave SLR direct focussing via the periscope instead of using a rangefinder. The idea was that you got the best of both worlds. At the time Exa and Exacta SLRs were the alternatives and the affordable screw lens cameras were the Zorkys and Feds. I still have the transparencies I took on a trip to Spain in 1965, many spoiled unfortunately due to a pin hole in a shutter blind. Good lens, well made camera for its day. A bit slow in use and I think the periscope mirror wasn't very clear in some light conditions. The later models have automatic periscope lowering and raising, it was manual on the earlier ones.
Quite a collectors item now. I'll be interested to hear how you get on with it.