Finke narrow bore BBb 4RV tuba allegedly intended for the performance of baroque music

1. Case

2. Side view

3. Full view

4. Valve section view #3

5. Valve section view #2

6. In the case

7. Valve section view #1

8. Body view

9. Bottom bow view

10. Bell view

11. With a Willson 3400 Eb tuba

12. Engraving