Vintage Dow Chemical Employee Service Award Tie Tack Pin 3 Diamonds 10K Gold

Vintage Dow Chemical Company employee service award tie tack in solid 10K gold, set with three genuine diamond accents. Features Dow's classic diamond logo in yellow gold over a white gold hexagonal base. Hallmarked "10K" with maker's marks "EMB" and "CTO®" on reverse, meaning it was made by O.C. Tanner Company. Complete with original chain and bar clutch, likely 1960s–70s. These pins were awarded for years-of-service milestones, with each diamond typically marking a service increment. Three stones suggests a long-tenured employee. Very good vintage condition; diamonds secure, clutch works properly. See photos for hallmarks and detail. Approx. 5/8" wide. Solid 10K gold with genuine diamonds, this is a substantial piece for collectors of corporate service jewelry, Dow memorabilia, or vintage menswear.