Contax RTSIII strap, came along with one of my 137MA's. It's hardly been used. I've never put in one of my cameras. (I'd much rather annoy Nikon owners by putting one of their straps on a 137, peeling leatherette and all).

Please e-mail if any further info required. I always try to list items accurately and will refund the cost of the item less postage should it not be as described.