Sonora B&S-made BBb tuba 4RV

1. Bell view

2. Valve section view

3. Thumb ring

4. Bell flare

5. Bell stack view

6. Bow guard

7. Bottom bow guard

8. Full view

9. Body view

10. Body back view

11. Leadpipe stay

12. Bottom bow view

13. Bell engravings

14. Resellers bell engraving

15. Makers bell engraving