For sale, a beautiful 10 Karat Yellow Gold Masonic Ring. Size: 9 Weight: 7.03 Grams Hallmarks: 10K (Gold Quality, 10 Karats, 41.7% pure gold). PSCO (Designer Company, Plainville Stock Company, started in 1886, Bristol, Massachusetts, USA) Details: Masonic Symbols on a Red Stone (probably simulated Ruby). Oval, Bezel set, measuring 11 mm long x 9 mm wide. Masonic symbols engraved with gold onto Red Stone. Band width narrowest: 4 mm Band width widest: 16 mm Side markings: You will note 2 x blue enamel painted symbols are faded on the side of the ring, next to the red stone. Originally these markings would have been in the shape of what looks like a bell, and a crest of sorts. This is a gorgeous, vintage handmade ring made with high quality products. Perfect as a special gift, for the collector of rare items or the gold investor. As this company (PSCO) has been operational for well over a hundred years, I am not sure if they resorted to using Simulated / Synthetic Red Ruby as the main stone. Still, this ring is surely vintage and of high quality.