This lens belongs to the first series of Industar 22. Inspired by the 3,5/50mm Fed lens, perhaps even with common parts, but with the new diaphragm scale.
The front of the lens is in aluminium and the diaphragm cursor is small. K330 by Princelle.
It was mounted on Fed-Zorki 1948. Weight: 117 g. Serial number: 11558 (Jacques M. coll.).