Like the K330, inspired by Fed.
.
Princelle: K335
SovietCams: PT5715
Marked: 50mm"."
Signs: small focus button / small aperture cursor
Aperture markings: from 3,5 to 16
Formula: 4 elements in 3 groups
Glass: uncoated
Weight: 125g (117g for the K330)
The weight difference is probably due to a front in brass (aluminium for the K330).
.
Photo 1: Serial number 209.
This one came on a 1948 Fed-Zorki serial #02373 (Jacques M. collection).
.
____________________________________________________________________