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Author Message   Mike_kovacs Tinkerer Username: Mike_kovacs Post Number: 17 Registered: 07-2006 Rating: N/A Votes: 0 Posted on Thursday, July 23, 2009 - 11:18 am:    The rewind plunger as you call it sits in the hole under the film sprocket. Is this what you mean by "film advance spool"? The easy test is simply to wind some film with the back off, don't you think? Check the button that rewind plunger contacts on the bottom of the film sprocket. Maybe its stuck? I'm working from memory here - most of my cameras are packed up for a move next month.