Baltimore Brass Company - Courtois AC131BR Prestige Alto Trombone with Trill Valve
Antoine Courtois alto trombone with trill valve for sale. I played this instrument few times, still like new. If you are interested and want more... | By George Krimperis | Facebook
Trombone alto Mib Prestige COURTOIS AC131 Atelier des Vents
Everything You Need to Know About Trombones - Trill Trombone