This big bore trombone is incredible, the slide is smooth, the trigger notes are lovely and open, and the sound is big and dark. I purchased this horn in April 2018 for $740 brand new. It's like a fresh, great situation. Schiller American Heritage Axial Flow Trombone The Attitude, the Authority and the American Trombone Sound. Concert and symphonic players prefer the Schiller American Heritage Axial Flow Trombone. The open wrap structure runs smoothly with the Schiller Axial Flow F Trigger. For wealthy, strong open sound in all registers of long-lasting nickel silver internal and outer slides. The balanced feeling of playing with.547 bore all the greatest quality bell brass.