Thank you for viewing. This is a listing for a Mamiya focusing screen for M645, type unknown, junk item. The original box is for a split-image screen, but the screen itself does not have a split-image line. The product contents do not match the original box. I believe it is a microprism screen, but the details are unknown. Please make your judgment based on the photos. It was difficult to capture in the photos, but there are three small spots of mold, about 1mm in size, and dirt on the outer edges. Please understand that this is a type-unknown junk item before purchasing.