Pendant  pin is dated and has Name engraved on backside. I took to coin shop and had it tested and it came back 10k gold. Shipped fast & free with USPS Priority mail.

The 10K Yellow Gold Phi Beta Kappa Key 1928 pendant is a piece of fine jewelry from the Colonial Trading Company. Crafted in yellow gold with a metal purity of 10k, this pendant features the shape of a key and is designed in a traditional style. It does not have a main stone, making it a simple yet elegant accessory perfect for those who appreciate classic and timeless designs.