Johann Michl & Sohn Musik - Instrumenten - Fabrik of Graslitz - Böhmen F helicon 4RV

1. Back view

2. Adjustable clocksprings

3. Large bow view

4. Details

5. Full view

6. Kranz

7. Valve section back view

8. Bell flare

9. S-links

10. Large bow seam view

11. Valve section view

12. Maker’s shield