Pre-1919 Josef Hüttl of Silberbach near Graslitz F bass valve trombone 3RV

1. Valve section view

2. Full view

3. Left side view

4. Front view

5. Engraved Kranz

6. Valve section back view

7. Engraved Kranz view #2

8. Valve section back view #2

9. Bell view

10. Bell flare