Standard Series, Key: BBb, Material: Yellow brass, Top action valves: 3 pistons, Bell: 443mm (17-1/2"), Bore: 18.5mm (0.728"), Finish: Silver-plate, With convertable leadpipe for marching
Standard Series, Key: BBb, Material: Yellow brass, Top action valves: 3 pistons, Bell: 443mm (17-1/2"), Bore: 18.5mm (0.728"), Finish: Silver-plate, With convertable leadpipe for marching