The Zorki-C has a taller finder to accomodate the flash sychronizer. The rewind switch is now a collar around the shutter release instead of a seperate lever. It doesn't have a self-timer. Some camera bodies are covered with ribbed green nylon instead of vulcanite.
Produced: 1956-1957
Name: „Зоркий-C“
Producer: KMZ
Frame size: 24x36mm
Lens: 50/3,5 Industar-22
Shutter: 1/25, 1/50, 1/100, 1/250, 1/500 and B
An excellent classificator for the Zorki-C series can be found at:
http://www.sovietcams.com/index.php?542408128