This item was given to me by an acquaintance, so I don't have all the details. However, after some research, I believe it's a viewfinder for the Mamiya 7. I think it's a 43mm viewfinder, but since the product details are unknown, it will be treated as a "defective" item. The condition is as shown in the images, and I don't think there are any noticeable scratches. However, the rubber on the eyepiece is deteriorated and torn.