B&S Gr55 Series 4-Valve 5/4 Bbb Tuba Gr55-L Lacquer
The B&S 3198 is a 5/4 size BBb Tuba features 4 rotary valves with the 3B linkage system. 3B ball bearing linkages on both ends of the valve connecting arm provide the ultimate in smooth and quiet operation. It has a .748″ bore (4th valve: .787″), a be
B&S B&S Gr55 Series 4-Valve 5/4 Bbb Tuba Gr55-L Lacquer GR55-L Brass Instruments, Tubas, Bb Tubas

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“B&S Gr55 Series 4-Valve 5/4 Bbb Tuba Gr55-L Lacquer“