This is a Mamiya 645 Pro 35MM F3.5 "N" Lens. This lens is designed to work with all models of the Mamiya 645 Cameras including the AF models from both Mamiya and Phase one. This is also the "N" Series, which is the latest design.
This Lens has a few issues. First, it has separation of the elements in the rear. 2nd, it has fungus, and 3rd, it is dented on the filter ring. And fourth, it does not focus. That being said, the aperture is snappy and no oil on the blades. Because of the issues, it is being sold AS IS with NO RETURNS.
I package professionally and will combine to save on shipping cost.