As a side note: I have restored a few of these, and most of the time the original cable has been damaged near the Cannon RWK connector, making it microphonic; cutting the cable, say 10-20 cm shorter, and re-soldering the Cannon connector was usually enough to make it perfectly usable again. If the original cable wasn't abused much, that is. But I like to keep things as original as possible, which may sometimes be less practical.