Selmer comp double horn 3P+1R asc 3rd

1940 Selmer compensating double horn 3P+1R - ascending 3rd valve

1. Serial #

2. Pistons

3. Bell engraving

4. Bell, pistons, & slides

5. Slides'; view

6. Water keys

7. Full view

8. Comp loops & shift valve

9. Valve section

10. Bell & body

11. Body back view

12. Back view