A George III gold and enamel mourning ring, circa 1790

A George III gold and enamel mourning ring, circa 1790, of cut-cornered rectangular outline, centring on a glazed compartment with a funerary urn in black and white enamel, to a ground of woven hair, within an outer border of black and white enamel, mounted in gold, the reverse with dedicatory inscription 'Helen Long, Obt Decr 1790 Aet', size M1/2, front measuring 2.7 x 1.8cm