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| BBb-Tuba
4 rotary valves Bore: 19 mm (0.748´´) Bell diameter: 480 mm (19´´) Height: 106 cm (41-2/3´´) |

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| BBb-Tuba
¾ "Model W. Hilgers" 4 rotary valves Bore: 19 mm (0.748´´) Bell diameter: 420 mm (16-1/2´´) Height: 110 cm (43-1/3´´) Nickel silver rim |

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| BBb-Tuba
4 piston valves (BIg Valve) Bore: 19 mm (0.748´´) Bell diameter: 480 mm (19´´) Height: 92 cm |
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| same
as 3301 but 5 valves (4 piston valves) 5th valve rotary, thumb operated |

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| BBb-Tuba
4 piston valves Bore: 1st to 3rd valve:19 / 4th:20mm (0.748´´) Bell diameter: 450 mm (17-3/4´´) Height: 99 cm (39´´) |