This is a Yamaha trumpet mouthpiece. All are Yamaha 11s, and while they are still usable, they have scratches and discoloration, so they are being sold as junk. Reference retail price: Current TR-11 ¥6,380 (tax included) These are not the current TR-11 models, but the older "11" type. They are stamped with "YAMAHA JAPAN 11". These were manufactured until around the early 80s, during the technical partnership between Yamaha and Schilke. They are classical and somewhat lightweight, and are easy to handle with a high degree of completion, favored by professional players. The size is equivalent to a Bach 7C, but the cup is slightly deeper than a 7C. Compared to current Yamaha mouthpieces, they feature a rounded, smooth-lined cup.