1929 F. E. Olds trombone with tuning mechanism in slide and two goosenecks for high and low pitches respectively

1. Bell engraving view #2

2. Gooseneck lock

3. Slide view

4. Bell flare view #1

5. Tuning slide arrangement IN

6. Bell engraving view #1

7. Gooseneck view

8. In the case

9. Tuning slide arrangementOUT

10. Bell flare view #2

11. All of it

12. Full view