This is a Mamiya 1M Coiled Electro Magnetic Release, or what I would call an electronic cable release. It is designed to work on all Mamiya 645 Super, Pro, Pro TL, and all the Mamiya RZ67 Models.
It is in excellent condition and works perfectly.
WE SHIP IN 1 BUSINESS DAY and we package professionally and will combine to save on shipping costs. We are also interested in BUYING your photographic equipment as well. We are Camera Exchange in Waterford Michigan.