Classic Swirl Sterling Silver Compass Locket Stanley London. $62.00. The Classic Swirl Design locket has an intricate "S" swirl design on the hinged lid.. The lockets are stamped "925" to designate the quality Sterling Silver content (92.5% pure silver).. These quality Sterling Silver compass lockets have ornate hinged covers that open to reveal 5/8 inch (15.9 mm) diameter working compasses.