Industar-22 red P
collapsible silver lens, #6139296
50 mm, f/3.5, M39 (LTM) mount, 
Krasnogorsky Mechanical plant (KMZ), Krasnogorsk, USSR

Very good condition. Front glass has tiny, very small cleaning microscratches. Inside there is microdust. Aperture and focus rings rotate properly. Body has signs of age and use.

"Zorki" camera is not included.

This is a standard lens with antireflection coating for Soviet rangefinder cameras "Zorki". Firstly was named "OI-22", then got the actual name "Industar-22". It had collapsible and uncollapsible verisons. Lens was designed in 1945, started to produce in 1948. In the end of 1950-s "Industar-50" was introduced instead of "Industar-22".
Lens was based on Leitz Elmar 3.5/50 from Leica II, but the aperture blades in Elmar is between first and second lense, in "Industar-22" it moved between second and third lens. In the end of 1950-s "Industar-50" was introduced instead of "Industar-22".
Also there was "Industar-22U" and "Industar-22U1" for enlargers and version for SLR "Zenit" and "Zenit-S".
This lens was made at Krasnogorsky mechaical plant named after Zverev (KMZ), also it was at KOMZ (Kazan). 

Characteristics: 
Lens s/number - 6139296
Number of lenses - 4 in three groups.
Angle of view - 46o
Number of aperture blades - 8
Limit of aperturing - 1:3.5 (max), 1:16 (min)
Resolving power - (centre/edge) 32/22 lines/mm
Minimal distance of focusing - 1.25 m
Type of thread - M39x1/28.8 (LSM)
Type of thread for the nozzles -  22,5 mm
Dimensions (mm): 45*45*47
Focal distance - 51,39 mm.
Mass - 106 g
One-layered antireflection coating