Tuba. Nominal pitch: C / B♭.
Technical description: Silver-plated brass. Extension piece for main tuning-slide to put instrument in B♭; extension piece for 3rd valve tuning-slide to give 'doigté ministériel' tuning. L1: 4th valve: perfect 4th. L2: 5th valve: semitone. L3: 6th valve: perfect 5th. R1: 1st valve: two semitones. R2: 2nd valve: semitone. R3: 3rd valve: minor 3rd, with extension piece for major 3rd. Valve type: 6 Périnet valves in two groups of three.