I have a Voigtlander Bessa 66 (Baby Bessa) which I bought at a flea market for $20. As far as I can tell it was made before WW2. I can't tell which lens is on it, because the swing-away yellow filter (which has the name of the lens on it) had, as usual, been torn away. The lens could be a Skopar (top of the line) a Vaskar or a Voigtar.
To my surprise the camera worked perfectly except for the T shutter speed. The bellows were light-tight and the shutter speeds well within limits for negative film. With the lens stopped down past f/8 the results are just fine.
The pre-war Bessa I'm pretty sure is the same size as the Perkeo, must be the smallest 6x6 camera ever made.