Hi there!
I have recently purchased a used 500 CM including an A12 film loading back. Soon afterwards, I stumbled over a used 503 CX (body only) on eBay, which I bought also (don’t ask... ;-). I'm considering to sell the 500 CM body and to use the A12 back on the 503 CX. Now I know that all parts in the 500 series are interchangeable -- theoretically. The problem is, I remember reading a post somewhere on the net (unfortunately I don’t remember where) which says that one has to check the serial numbers of the body and the back, and that they "should match". What can happen if they don’t match? And what could the poster mean with matching serial numbers? Doesn’t each part has a distinctive, individual serial number anyway?
I have recently purchased a used 500 CM including an A12 film loading back. Soon afterwards, I stumbled over a used 503 CX (body only) on eBay, which I bought also (don’t ask... ;-). I'm considering to sell the 500 CM body and to use the A12 back on the 503 CX. Now I know that all parts in the 500 series are interchangeable -- theoretically. The problem is, I remember reading a post somewhere on the net (unfortunately I don’t remember where) which says that one has to check the serial numbers of the body and the back, and that they "should match". What can happen if they don’t match? And what could the poster mean with matching serial numbers? Doesn’t each part has a distinctive, individual serial number anyway?