This sale is for a Mamiya RB67 50mm f4.5 C lens in excellent condition. It is of course in perfect working order, including flash sync and mirror up.
This lens is mechanically perfect, with perfect glass. There is obvious paint loss on the knurled rings from use but this is still a superb lens, and comes complete with a Hoya UV filter. It just looks a used rather than having any specific issues. It has great glass with no issues; it is a very nice lens. I have used this lens for a few shots and it is absolutely fine.
This is the latest C type multicoated lens – much better optically than the earlier pre-C single coated optics.
Unless you do something daft like dropping it, it will outlast just about any other piece of photographic kit out there. These lenses are just made to keep on working and working – no electronics to go wrong!