Mamiya RB67 RZ67 +1 Diopter Magnifier for Waist Level Finder
This is the original +1 magnifier for the waist level finder on Mamiya 645 cameras. It is very helpful for finding critical focus.
It is in good condition with moderate wear (see photos). There are a couple of light cleaning marks on the glass but they are very small and not visible while in use, they do not impact the function of the magnifier.