Zeiss Ikon Ikonta 521/16

For the first time in ages, I bought another old camera. I was really looking for a Super Ikonta, but they are always very expensive, so I decided to settle in the meantime for this model. It takes 12 photos on 120 roll film; the shutter is 1 - 1/300 sec and B, and the lens apertures are f/16 to f/3.5. It has manual focusing and exposure.  The seller thought it dated from 1948-51, but on close inspection, I think it may be a pre-war model - more research is needed.  Anyway, it's in very nice condition and everything seems to be working.