Hi All. Here's a lot of 3 Vintage 1960s 70s GM Tie Tac/Pins in very nice intact condition. #1 is a Blue Sapphire General Motors engraved with the Carriage logo. Measures 9mm x 13mm. #2 is a green Emerald engraved with the Cadillac, Oldsmobile, and Buick logos. Measures 10mm x 13mm.  #3 is a green Emerald GM engraved with the Truck and Buss logo. Measures 10mm x 13mm. 1/10 10K stamped on all. (white gold filled) The only issue is some very light oxidation/pitting on the backside of the Truck/Buss pin. No chips/scratches or other issues with any of them. Pins and stones tight in their mounts. Stones measure approximately 2mm.