A George III mourning ring, circa 1797, and two Victorian gold and elephant hair rings

A George III mourning ring, circa 1797, and two Victorian gold and elephant hair rings, late 19th century, comprising: a mourning ring, the wide band applied with black enamel, the dedicatory inscription 'Philip Perring Esq Ob 7 July 1797 Aet 66' in reserve, size Q, British hallmark for 18ct gold, date letter B for 1797, sponsor's mark WH; and two gold rings mounted with strands of elephant hair, sizes K and P respectively