A Queen Anne gold memento mori ring

A Queen Anne gold memento mori ring, centred with an oval locket compartment containing a skull and cross bones between the gold wire letters EJ on hair ground, glazed with faceted crystal, with black enamel decoration exposing a gold skeleton with crossed bones above the skull and a crossed pick and shovel below the feet, engraved to the interior 'ET : obt 29 Aug : 1712 aet 45', maker's initals WN, size P