This sale is for a really excellent condition Mamiya 645 Super AE Prism Finder N, fully tested and in perfect working order. It is suitable for use with the newer Mamiya 645 Super, Pro and ProTL cameras and will not fit the earlier M645 models.
This prism is in great condition. There are a few very light scuff marks on the case (as always) and a few specks of dust inside, but it is otherwise superb. It comes complete with the (often lost) rear eyecup.
Instructions for this prism can be downloaded from this website. This AE prism is functionally identical to the later 645 Pro AE prism FE401 – just in a different shaped case.