Source
B&S 3098 CC tuba (official)
Cited by
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B&S PT-6
Tuba · Germany
The B&S PT-6 is a 5/4-size C (CC) orchestral tuba developed under the Perantucci name and built by B&S as model 3098, with five rotary valves. It is a widely used professional orchestral tuba noted for a large sound and a strong record in orchestral auditions.