B&S 3146/2G-GL Brochon Challenger II GM flugelhorn, model Brochon, 10,40 mm (0.409") ML-bore, Ø 150 mm (5.905") goldbrass bell, monel valves, 3rd slide trigger, nickelsilver outerslides, 2 waterkeys, lacquered, incl. mouthpiece and luxury case