This sale is for a very rare, near mint Mamiya 645 / RZ67 External Battery Case to fit all Mamiya 645 and RZ67 cameras. It has minimal signs of use. The instruction sheet can of course be downloaded from this website.
This case is designed exclusively for the Mamiya 645 ad RZ67 cameras for use in cold weather. It allows you to keep the battery inside warm clothing where your body temperature can maintain the battery voltage. It takes the same 6v battery as used in the camera. This battery case has been used so the wires are now not perfectly straight as when new, but this is the only sign of use.