Another version of the Industar-22.
The pictured lens was made in 1950 (serial #5021081) at Kazan. It was mounted on an early Zorki-Zorki 1b serial #32870 (Jacques M. collection).
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Factory: KOMZ (Kazan)
Weight: 104g, less than the previous lenses
Glass: coated
Princelle: K360
sovietcams.com: PT5770: 4 and 5 digit serials without date prefix
sovietcams.com: PT5775: 7 digit serials with year prefix
fotoua.com: KOMZ type-1