LOT! 39 Vintage UNITED Airlines Buttons - Hawaii Chicago pinback 767 Boss flying

Description

My mom used to work for United Airlines through the 70s and 80s and we collected all 39 of these.
All are in very good condition for their age. Pins are in place and not bent out of shape. Some have surface light rust or stains on the metal backs. The "You're the Boss" button has sticker residue and a dent from the pin behind it. I didn't try to take the residue off but it should come off fine. The larger of the 2 small Olympics buttons is missing the back "keeper". The pin is fine. One of the "o oe ka haku" buttons has stains on the front and another has a bent pin. And one of the red striped buttons has a deep scratch on the front showing the metal behind the decal.
Please see all pictures for exact condition of each. And ask questions if you have any!
Thanks for looking!