I put numbers on your picture to help identify what you have.
[ATTACH=CONFIG]548539[/ATTACH]
It looks to me that the pieces #1, #5, #8, #17 (part of hemstitcher) and #18 could be used on the 115.
1. your original foot
2. Shirring plate for a long shuttle machine -
3. This is a drawer lock I believe and looks like it might be the triangular ended type
4. Ruffler
5. Seam Guide THIS might work on your 115
6. I think that this is part of the tucker with 9 and maybe 19
7. Light fixture part
8. imitation hemstitcher piece - might be attached to the bed
9. See #6 - part of tucker
10. Binder
11. Hemmer
12. Hemmer
13. Hemmer
14. Hemmer
15. Cording/Braiding foot
16. Maybe another ruffler
17. Maybe part imitation hemstitcher?
18. Monogram Embroidery Gude probaby by Yandell Sales. This will probably work on your #1 foot
19. I think this is part of Tucker with #6 & #9
Janey - Neat people never make the exciting discoveries I do.