Please find an excellent condition vintage King H.N. White Symphony Dual Bore Super 20 Bb trumpet with a good condition Protec case and good condition Bach Mt Vernon 10 1/2C mouthpiece. The serial number is 353443 making date of manufacture in Cleveland, Ohio around 1957-1958. The bell is 4.88\" with an actual measured bore size of .462\" at the 2nd valve slide(my measurements). The dual bore designation(according to the King website) refers to the 2nd valve slide measurement of .458\" and the second measurement of .468\" measured at the bell tail at the 1st valve casing. Without removing the bell I can not confirm this. The instrument has been chem cleaned and thoroughly cleaned inside and out. All lacquer has been removed, dents and dings have been removed then re-lacquered with epoxy baked on lacquer. All new valve, top caps and stem felts as well as new waterkey corks. All valves are smooth and fast and yield a nice pop when testing compression. 1st and 3rd valve finger ring adjustments moves freely without drag. No red rot. The case has been sanitized no odors to worry about. Please reference the H.N. White website for more information on the history of this fine instrument. Feel free to ask questions. Thanks for looking.

---