Besson PRODIGE: student serie Bb Tuba
 
Key: : BBb
Ø bore: : .690' ( 17,53 mm )
Bell: : hand-made in yellow brass - Ø bell: : 16' (408 mm )
Valves: : 3
Waterkeys: : 2
Strap rings: : 2
Finishes: : bright silverplate or clear lacquer