Signet Rings

Hollow gold signet ring in the British museum

Tiffany & Co 18k gold signet ring

Strictly speaking a signet ring is a ring that has engraving on the top, traditionally to impart insignia into wax or other seals to ensure security, the contemporary definition has expanded to include other rings that have the flattened top and broadening shoulders of the traditional signet ring even if no engraving is present