The years of service these pins represent is unknown to me. Any help would be greatly appreciated!

11 - One red stone. Possibly a 2 or 5 year pin.
12 - Three red stones. Claimed to be a 15 year pin.
13 - Red/white/red stones.
14 - Three yellow stones. This "pin" was mounted on a brooch.
15 - Three white stones, one large. Claimed to be a 30 year pin.

Pretty much self-explanatory.

21 - Two years.
22 - Five years.
23 - Ten years.
31 - Fifteen years.
32 - Twenty years.

Misc

Ten year pin. Close-up showing two-piece construction.
Ten year pin. Shown on original velvet card.
5 to 20 year set.
Wings promo pin. On original card.