Bell Aircraft

11 - Small wings pin. I believe this to be a 1 year pin rather than simply a promo wings pin.
12 - 5 year pin.
13 - 10 year pin.
14 - 15 year pin.
15 - 20 year pin. Note the small blue stone.
21 - 2 year pin, Bell Aircraft Georgia Division.
22 - 5 year pin variation.
23 - 10 year pin variation.
24 - 15 year pin variation, Bell Aircraft Corporation.

Bell Helicopter/Bell Helicopter Textron

31 - 15 year pin. Note the different placement of the number of years represented from the Bell Aircraft version.
32 - 10 year pin, Textron.
33 - 15 year pin, Textron.
34 - 35 year pin, Textron.

Bell Aerosystems/Bell Aerospace

41 - One red stone, Bell Aerosystems. I suspect that this is a 5 year pin.
42 - Three red stones, Bell Aerosystems. I suspect that this is a 15 year pin.
43 - One white stone, Bell Aerosystems. I suspect that this is a 20 year pin.
44 - One red stone, Bell Aerospace. I suspect that this is a 25 year pin.

Miscellaneous

Service Division pin. Promo or training pin.
Training School pin. Promo or training pin.
Set of 5 through 25 year pins. Lousy picture, but shows four "globe" style pins and one Textron. Interesting that the 25 year Textron pin appears to have stones while the 45 year Textron pin above does not.
Set of 5 and 10 year Bell Helicopter pins, and 15, 20, and 25 year Textron pins.
Set of a Bell Aircraft 5 year pin and two Bell Aerosystems pins.