Please find an excellent condition professional silver-plated Yamaha YFH 631GS model flugelhorn with an as new original Yamaha flugelhorn case. Also offered is an as new Yamaha 11F4 silver plated mouthpiece. The serial number is 438969. The bore size measured on the 2nd valve slide measures .431 to .432". The bell diameter measures 6.0".If you do your research as you should you will find that the 631G is highly praised on most professional trumpet player blog sites. The silver plating is in excellent condition with minor areas of silver loss from small ding removal and subsequent buffing of scratches. What few dings the horn had were gently removed. There are a few areas on the bottom portion of the bell tubing near the joint where the bell flair ends and connects to the tubing that leads to the 3rd valve. This area shows slight signs of dent ball repair which is very hard to picture. For the most part not noticeable but nevertheless present, please see pictures. The instrument has been chem cleaned and thoroughly cleaned inside and out. The horn was ultrasonically cleaned as well. All new valve stem felts. New waterkey corks(3).The 3rd valve trigger moves freely without drag. Excellent valve speed and compression. The Yamaha case is in almost new condition. It has been thoroughly cleaned and sanitized using a hospital grade disinfectant. The case latches secure the instrument nicely and there is one key. The horn will be thoroughly hand polished again the day before shipping. It will be clean, shiny, sanitized, valves oiled, slides lubricated and ready to play right out of the box. I will also include an "Ultra Pure Deluxe Trumpet Care Kit" with the shipped horn(see picture with case).Feel free to ask questions. Thanks for looking.