3137 L-Bb-Trumpet Challenger, Handhammered one piece bell, Boxed bronce springs, Challenger Monel pistons, Nickel silver outer slides, Educational stop for the 3rd valve slide, Bore: 11.66 mm (0.459") ML, Bell diameter: 121,5 mm (4.782")
OPTIONS:Gold brass bell, Gold brass leadpipe, Heavy bottom caps with O-rings, Bright silver plating, Black nickel plating