Check out this fantastic Martin Committee professional trumpet up for grabs.This is a 1955 horn it appears to be a medium bore .451" in the original case This horn is in very good condition for its age. All slide are free and move the 3rd slide is a bit tight. Valves excellent!! The original lacquer has some ware and loss on the lacquer but again for its age not bad at all.Original CaseAppears to be a medium bore instrumentLacquer in good condition for the age3rd ...valve slide a bit stiffCleaned and ready to playPictures tell the rest of the story! Please feel free to email with additional questions.