1934 Conn 24h Trombone "Ballroom" Model. Great horn and a great player! This is perfect for lead playing. You can really put some heat to this thing!The "Ballroom" model has a slightly closer bell for easier mute changes..484 bore size and a 7 inch bell.Stockings do show some wear but not too bad for an 89 year old horn!Comes with the original Conn case with remnants of a vintage sticker. Step back into the 1930's with this one!