I bought some bits and pieces some time back and they say they are Original Hamilton parts, but since i do not have any Hamilton books i have not real idea of what they are for, some say WW and the grades but like some one to confirm this..

290270 Lever setting
290440 Lever setting
290600 Lever setting
290781 Lever setting

607206 balance staff = 979-979f,987987a,987e,978f,987s
607440 balance staff= 911m,980,980m,980b,982,982m
607870 balance staff
614440 stem winding= 980a,b.982 982m.
614530 stem winding
if some one can help me out, then i will know what i really have. thanks Francis

Here's the setting levers.

Balance staffs.

More staffs and winding stems.

And the rest of the winding stems.
RR

Thank you so very much, great info. now they have a place in my American WW parts... Francis