George III (1760-1820), Pre-1816 issues, Proof Sixpence, 1787, by L. Pingo, in silver, bust right, rev. cruciform shields with crowns in angles, semée of hearts in Hanoverian arms, edge plain, 3.17g/12h (ESC 2212 [1640]; Eimer 86; Selig 1228). About as struck, attractive tone
£1,200-£1,500

This is a Proof not a specimen