I’ve got the Perkeo IIIe with the rangefinder and haven’t used it very much at all, but I agree with this reviewer that they are really nice cameras.   I have a few of the Ikonta’s too, and the Bessa I, II and III.  It would be fun to compare them all sometime, but certainly the Perkeo’s are nicely built and very lightweight.  What is your favorite folding 120 rangefinder?