This is a Bob Reeves mouthpiece. It is a Doc Severinsen model mouthpiece. Currently, it would cost around ¥40,000 to purchase new. Thank you very much. Detailed specifications: ・Rim: 42 rim ・Cup: shallow-S cup ・Throat: 28 (3.57mm) ・Backbore: modified 692s ・Shank: #5 (Reference: Bob Reeves) Zinger (Doc Severinsen) 42 Doc Severinsen has been using Bob Reeves mouthpieces for many years. This "Zinger" model is the mouthpiece that Mr. Severinsen favors most among the many custom Bob Reeves mouthpieces. The rim is "42" and has a slightly shallow and tight backbore. (Quoted from: Joy Brass)