Zenit B, vintage Soviet SLR camera
 35 mm, #69022312, M42 mount
Krasnogorsky Mechanical plant (KMZ), Krasnogorsk, USSR

Sold as not working (for experiments). Shutter sometimes work fully properly and sometimes curtains close lazy and get stuck. Viewfinder has a very thin vertical line. Self-timer works properly. Body has small signs of age and use. Shutter curtain has abrasion area with light leakage. Lens is not included, body only.

"Zenit B" (pronounced as "Zenit V" in Russian) was made in 1968-73 by Krasnogorsky Mechanical Plant named after Zverev (KMZ), Krasnogorsk, USSR. 
Tottaly 889 758 pieces were made. This is a simplified version of "Zenit E" without exposure meter.
Default lenses are "Helios 44-2"(2/58), "Industar-50-2"(3.5/50). 
Small lot was done with M39 mount (like early "Zenit E", "Zenit-3(m)", "Zenit", "Zenit-C" and "Crystal").
"Zenit B" was very cheap (90 Soviet roubles for version with "Helios-44-2" and 67 Soviet roubles with "Industar 50-2"), which is 10 Soviet roubles lower than "Zenit E". 
Camera has a tripod socket with 1/4" mount.
"Zenit B" was a base for:
-"Zenit VE" - produced by KMZ at 1972-85, 1506 pieces made. Medical version for shooting when endoscopy. No lens was included but an adapter for endoscopy was incuded.
- "Zenit B laboratory" - produced by Belomo in 1970-80s. Camera was designed for reproduction shooting and photomicrograph. No pentaprism, no light meter, vertical viewfinder. The only shutter speed is "B".
- "Zenit VM" - produced by KMZ at 1972-73, 1239 pieces made. Simplified version of "Zenit EM" without exposure meter.

S/number - #69022312
Frame size - 24x36.
Shutter speeds - 1/30-1/500, B.
Type of thread - M42x1/45.5
Body - aluminium.
Dimensions (mm): 137*91*54
Mass - 681 g