George IV 1829 Silver Shilling Enamel Coin mounted for wear on pin bow

A scarce original 'George IV 1829 Silver Shilling Coin' fitted with ring to form a pendant and suspended from a pretty engraved 'Sterling Silver' bow; the reverse bearing the Royal Crest over 'Union Spray' representing the unity of England, Scotland, Ireland, Rose, Thistle, Shamrock inscribed 'BRITANNIARUM REX FIDEI DEFENSOR' and inlaid with red and electric blue enamel; the obverse depicting the head of George IV, date below just the last numeral showing a '9' with legend 'GEORGIUS IV DEI GRATIA'. Good condition, complete with pin fittings, no damage to the enamel. Diameter approx 24mm.