・Listing ends today!! Immediate purchase is welcome!! No discounts are available!! ・A rare and exceptional instrument! ・Extremely rare, vintage, top-of-the-line instrument! I am offering a NIKKAN JAPAN TR-231 Imperial Model (in excellent condition, cleaned, maintained, and test-played) of the highest rank! ・The sound quality and tone are impeccable, so I highly recommend it for those who prioritize performance! ・A very rare, now discontinued, vintage instrument! This is a NIKKAN JAPAN TR-231 Imperial Model of the highest rank! ・This is a masterpiece that I confidently recommend, having undergone thorough inspection and test playing! ・Appearance: Some distortion on the bell edge, repaired through maintenance!! There are also about 3 small dents (not recommended for those who are concerned about minor imperfections)!! Otherwise, there are no small dents or major dents!! ・Stains have been removed and the instrument has been completely cleaned to achieve a beautiful appearance!! ・An extremely rare instrument that you won't often encounter! ・Suitable for all genres! ・Accessories: Mouthpiece (TR-1 5MS), vintage hard case ・Highly recommended! ＜Maintenance Details＞ ① Disassembly of all parts and thorough inspection. ② Removal of old grease, rust, and blackening that cause sticking of all tuning slides. ③ Cleaning of all parts and thorough cleaning of the inside of the tubes. ④ Complete adjustment of all tuning slides and pistons (lapping). ⑤ Final check and thorough test playing over a period of time.