Miraphone - Model 691 Bb/F/Gb Bass Trombones

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- Style: Open wrap
- Two valves
- Rotary valve
- Double rotor (F/Gb)

Options/Customisations available:

Body materials:
Gold brass with combined gold brass-nickel silver valve section
- Yellow brass with nickel silver valve section

- With
- Without


Key Bb
Intonation 443 Hz
Finish Lacquered
Bell diameter 250 mm (9.843 inch)
Valve section bore 14.3 mm (0.563 inch)
Mouthpiece PO15
Height 1215 mm (47.835 inch)
Weight 2.32 kg (5.11 lb)

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