For sale, Mamiya Sekor Metered Prism Viewfinder Finder for M 645.
Fully functional, decent condition. The mirror inside has a line visible - looks like a strap of adhesive or something like that but I'm not entirely sure. It would need to be opened up and then cleaned. Other than this, it's in excellent condition with very few signs of use.
This is the item/ unit only but will be well packed for posting.
Any questions, please ask!