※ Regarding price negotiations, I have described them in my profile. Please take a moment to review it beforehand. This is a YAMAHA tenor trombone, model YSL-647. It uses a large shank mouthpiece (thick tube). In addition to the instrument itself, the following items are included: ・Mouthpiece (YAMAHA 51B. Playable, but included as a bonus.) ・Hard case (for transport) It appears to be a model manufactured and sold around 1976-1984. It was a professional model released before Yamaha had custom model trombones, and I believe it was the highest grade tenor trombone at the time. It's a thick-tube trombone, which is rare for tenors. I think it's the successor to the YSL-641. The 641 had a red bell + nickel silver body, and its specifications and sound were unique, but this instrument has a yellow brass body. While the individuality has diminished, it gives the impression of being easier to use. As expected of a high-end model, it has good sound, resonance, and response. It also has a wide range and a tone that doesn't stand out too much, so I think it's easy to use in all genres. For the listing, it has been cleaned with a cleaner and neutral detergent. In addition, the slide felt, water key spring/cork, and bumper rubber have been replaced. After cleaning, it has been greased and the sound has been checked, so you should be able to use it immediately. After the check, the slide has been wiped to protect the inner tubes. (If you wish to have slide oil applied, please contact me after purchase) There are scratches, lacquer wear, dents, etc., and it shows signs of use, but the condition is good. Especially the slide action is quite good, and it slides to the 7th position by its own weight without catching, even without applying oil. I believe this is a product that will not cause any problems in playing, but it is a used item, so please judge from the photos and consider it. The previous model, the 641, is seen fairly often, but the 647 is not often seen even in auctions, so I think it's a bit rare. I would appreciate it if you would consider it. Please note that it is also for sale elsewhere. I will give priority to the person who purchases it first, so please be aware of this.