Leica IIIF will not advance film

[beemermark]

My IIIF will not advance film. The take up spool slips on the the advance spindle. I have a number of Leica RF and only the IIIF has a problem. Spools work on other cameras (like my If) but not on the IIIF. If I advance the wind knob the takeup spool slips with the least amount of finger pressure. If I remove the spool and put finger pressure on the takeup spindle the spindle doesn't slip. So the problem is that the (any) takeup spool doesn't grip the advance spindle. Can't see anything physically wrong. Ideas?

 

[John Wiegerink]

Something wrong with your little rewind lever? Does the take-up spool slip both ways?