.515 bore, 8 inch yellow brass bell, key of Bb, SN 825917.  See photos for condition.  This horn plays great and sounds great, top to bottom.  Valves are fast and free, no sticking, with great compression.  Slides all snug, move easily.  Clean, straight horn, needs no work, ready to play right away, no signs of prior trauma.  Hardshell Olds case has minor exterior scuffs as expected but otherwise in excellent condition, clean inside without unpleasant aroma, hardware all intact and working as it should.  Sorry, no mouthpiece.