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Author Message   Markus Tinkerer Username: Markus Post Number: 127 Registered: 08-2007 Rating: N/A Votes: 0 Posted on Thursday, June 25, 2009 - 03:37 pm:    Sounds similar to the mechanism on the Zorki 4. I bought one with a stuck rangefinder, the spring was still in place but too weak to push the cam out. A drop of oil on on the pivot and a minute or two of exercising the mechanism by hand and it now works perfectly.