Hello everyone,
Bill, your idea that some faulty, (or maybe not faulty) early Fed-1 cameras were upgraded to Fed-1-S does seem reasonable and the most likely explaination, especially if the owners were influential in the "party". I can imagine this happening. A Fed-1-S would not have been available when the original camera was purchased, (or presented in some cases). Of course it's only natural that the owner would want the latest and best version available at the time. Guido's comments that Leica had a similar practice of replacing cameras with a re-engraved new camera would seem to support this idea despite the fact that Leica were and of course still are German. I'm sure that both Fed and Leica would have been well aware of the activities and policies of each other at that particular time, and perhaps there was some unspoken competition between the two.
So when given some thought it does seem reasonable that some Fed-1-S cameras with a Fed-1-a serial number could legitimally exist.
I'm still slightly worried that so many of these cameras are coming from just one or two sources. I'm also aware that most of the cameras that we have between us which have an earlier serial number than the model would suggest didn't come from these sources, and there is no doubt in my mind that our cameras are perfectly honest and genuine.
My camera number 4875 is an early Fed-1-b and would in any event have had a low serial number, so there wouldn't have been any point in changing it to a slightly lower number than it would have had anyway. So in my case I think that the camera is a factory replacement for Fed-1-a number 4875, which must have failed within a short time after being sold, and replaced within a few months.
I'm sure that this applies to all our cameras showing the same anomaly, they would all have been replaced at various times depending on when they failed.
So I think we have already gone a long way towards solving this mystery, but it would be nice if we could find some defintive supporting evidence. Perhaps Vlad will be successful!
Best wishes to all, Jim


