Alexander Mainz compensating double tuba F & BBb 4RV

Oct 23, 2010
1. Model # (maybe)
2. Provenance
3. Engraving
4. Patch under lacquer
5. 13.5"; flare
6. Case hardly original
7. Bottom bow
8. Front
9. Main & 4th slides
10. Leadpipe stay
11. Body rear - 3rd slide pulls upwards
12. Valves