This sale is for one difficult to find, near mint condition rubber eyecup for any Mamiya later type RB67 / RZ67 prism finder – the RB67/RZ67 standard (type L2) non-metered prism, RB67 PD prism, RZ67 Pro PD and AE prisms and the RZ67 Pro II AE prism.
This eyecup has minimal signs of use. It is not quite as new but is really superb. It does the job!
Extremely hard to find in any condition. This one is probably as good as you will get.