Not long had a Leica IIIA from Collectable Cameras, serviced in fact, with a 50mm Elmar. I got it for my 70th birthday. I ran a couple of cheap colour negative films through and everything worked fine except when my eyebrows caught the shutter speed dial.or I set the shutter speed before winding on. I decided to take it to a friends wedding for some outdoor shots, not as the principal photographer, thank goodness. When the pictures came back most shots showed the image of a bit of film which had got stuck between the shutter blinds. In the worst case, like this...
Now I know that this shot wasn't ever going to be a keeper but it does illustrate the point.
After I got the films back I had a look at the shutter and removed a fragment of film very carefully with tweezers. Good job it didn't get into the shutter mechanism I suppose, at least I hope.
Just to be clear, I
did trim the film correctly. What I must have done wrong is to push the end of one of the previous films into the take-up spool too hard so that, when I rewound the film into the cassette, a bit snapped off. Rewinding into the cassette maybe isn't a good idea with this camera/spool combination. Subsequently I have read that on the internet.
I was so confident that the camera was working I took it on holiday in April. Same problem again but not quite as severe.
Now you might ask why I didn't discover much later that something was amiss. I was just being parsimonious and waiting until I had lots of films to send of for processing so I paid as little as possible for return postage.
Nothing wrong with the camera as it came from Collectable Cameras by the way, you can't criticise the service and quality of the stuff from there, the first couple of films were great apart from the eyebrow and shutter speed setting problem (missed frames).
So, finally, I have run another film through at a variety of shutter speeds to see if the curtains are damaged or whatever. I'm hoping not.