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Boosey & Hawkes, Imperial Model, BB flat tuba, 3 piston, ca. 1938 | V & E Simonetti Historic Tuba Collection
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Boosey und hawkes besson be967 Sovereign Serie Euphonium 4 Ventil B flache|valve cartridge|valve pullervalve chain - AliExpress
![Boosey and Hawkes, Oxford, E flat tuba, 3 piston, c. 1954 | V & E Simonetti Historic Tuba Collection Boosey and Hawkes, Oxford, E flat tuba, 3 piston, c. 1954 | V & E Simonetti Historic Tuba Collection](https://simonettitubacollection.files.wordpress.com/2021/06/img-4050.jpg?w=1400)
Boosey and Hawkes, Oxford, E flat tuba, 3 piston, c. 1954 | V & E Simonetti Historic Tuba Collection
![Boosey and Co., Compensating System, B flat euphonium, 4 piston, c.1917 | V & E Simonetti Historic Tuba Collection Boosey and Co., Compensating System, B flat euphonium, 4 piston, c.1917 | V & E Simonetti Historic Tuba Collection](https://simonettitubacollection.files.wordpress.com/2013/04/200801-1.jpg)