Item is a Holton Bb trumpet from Elkhorn, Wisc. .  No. on mouthpiece ST500 indicates is Al Hirt trumpet.  Serial number 531443 indicates year - 1975 or 1976.  Trumpet is missing one finger button.  Valves work smoothly.  Front slide moves easily.  No dings, but needs good polishing.  Two mouthpieces included as well as mutes, and original case.  Registration papers included.  Trumpet has Al Hirt medallion on the front slide, as well as the impressed number ST500 identifying the horn .

　　Believe the finger button can easily be replaced.  Sold as is.  Ebay messenger any questions.