This is a mouthpiece made in Japan by the popular Atelier Momo (now Brass Lab. Momo). It has a gold-plated inner rim. The ⭐︎ mark indicates that it has been acoustically treated. Personally, I think it's a good mouthpiece that produces a well-defined, beautiful sound without being constricted. There are some scratches on the shank, but otherwise, it's in good condition. Below are the specifications: Inner diameter: 17.0mm Bore diameter: 3.72mm Cup depth: Medium <Reference> A new mouthpiece with the same gold-plated inner rim currently costs 47,300 yen.