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[Jim]

 Recently acquired this camera. Cosmetically lovely. Seemed to have a shutter problem(Prontor-S). Opened up the shutter today and it definitely has a problem, maybe more than one. Someone has removed the speed escapement unit and a couple of other lever

[rick oleson]

 I would not assume that the internals from another Prontor would fit; I see a tremendous variety of little (and major) details inside shutters of the same brand and basic model name.  I'd try to at least find one of similar manufacture date, but it({

[Winfried]

 I (at least) partially agree with Rick. It is not very advisable to swap parts between shutters even of the same model name. I once did so with the internal shutter release levers of a Prontor SV - did not work until I put back the original one.
 
H

[seymourmike]

 I have purchased a Zeiss Ikon Ikont prontor - sv. The shutter is stuck open. I have tried to rotate the shutter speed to Bulb, as has worked on other cameras, and it will not go that far. The shutter release is stuck.  
 
I'm not a camera repai