This is the I-ATHLETE IA-450 model, worn by Kazuyoshi Miura. I used it for about two years, and then stored it at home for another two years. There are some visible scratches, but I believe there are no problems with the functionality itself. The hinge is slightly misaligned, but I will also include the glasses case that came with the purchase. Please consider this if you understand that this is a used item. Feel free to ask any questions!