Mainsprings included in box:

ILLINOIS SIZE 6 No. B 4382 (3 of them)
TRENTON 16 Size No. B 4391
ELGIN 0 Size (Class 77, D.B. Wide) No. B 4368
ELGIN O Size (Class 60, D.B. Narrow) No. B 4365

Great condition. Still in packaging.