How rare is this adapter you ask? Well, since it is the only adapter I have to sell this afternoon, that makes it very rare. As I recall this was a 39mm to Bayonet M mount adapter, but it has been many years since I used it. Let's say that's what it is, but honestly there's no end to the number of cameras we could make this marvelous adapter fit. All we need is a hacksaw, a file, a drill, a hammer or medium sized rock and some epoxy and/or duct tape and/or chewing gum. Possibly a little beer. Maybe some of that adhesive they used to apply to paneling when it was glued in place. Just let your mind run free on stuff like this. Of course you have to start correctly...it isn't any old adapter which can fit into this distinctive category, is it? No, it takes a very special adapter to qualify for total adaptability and special with a capital S is what you're going to get this fine autumn afternoon. $10 plus actual cost of shipping.
PayPal ok for international sales but check/cash/money order for domestic sales please.
If questions, please ask.