This sale is for a used but still really good condition Mamiya RB67/RZ67 Prism Magnifier FD701 – suitable for any RB67 or RZ67 standard, PD or AE prisms.
This magnifier has obvious signs of being connected to a camera but works perfectly. It has great glass and no problems – except cosmetics!.
This is an extremely rare item – these come up very seldom on eBay. I use one regularly – really a most useful accessory. Essential for achieving accurate focus when using a prism. Please note that this magnifier cannot be used with the original RB67 Pro/ProS angled prism finders, but it is suitable for all later models.
Try finding another one!