This is the MF-3 camera back for automatic rewind stop, used with the Nikon F2 motor drive. The motor drive MD-2 can be used with a normal camera back, but replacing it with this one will automatically stop the rewind. The item has been used, so it has a corresponding feel of use, but I think it's in good condition. There are very slight scratches on the film pressure plate, but it shouldn't affect use, but please refrain from purchasing if you are looking for perfection. Please see the 3rd and 4th photos for details. It should have worked fine with the MD-2 I have listed separately. I couldn't confirm the operation this time because the MD-2 body is broken, but the sensor switch seems to be working. In addition to this, I am also selling a junk MD-2 and MB-1, so please take a look.