The AC420MB Series was developed in cooperation with famed French trombone artist Michel Becquet. The 420MB Series features a .547-inch bore with a Sterling silver mouthpipe plus an open wrap F Attachment designed with minimal resistance and superior resonance.

The Antoine Courtois AC420MB Legend Series F-Attachment Trombone offers amazing performance and sound for the player looking for a symphonic trombone. The AC420MB Legend features a .547" bore combined with an 8.5-inch one piece bell that provides excellent projection and response. The AC420MB also features a Sterling silver leadpipe for an increased tonal core and response. The traditional closed wrap F-Attachment features an adjustable thumb trigger for player comfort and mini ball linkage for smooth action. The Courtois AC420MB Legend F-Attachment trombone includes a lightweight contoured case and mouthpiece and is available in lacquer finish with a choice of yellow or rose brass bell.