1925 Pan American (assumed) BBb raincatcher sousaphone

1. Bottom caps

2. Neck & Lower leadpipe are Selmer-Bundy

3. Slide conversion to low pitch

4. Front

5. Bell flare

6. Lower-leadpipe stay

7. Main & 3rd slides

8. Valves

9. Collar

10. Bell knee

11. Serial #

12. Ferrule

13. Knee guard