Great Britain
George III Proof 6 Pence 1787 PR63 NGC, Royal mint, S-3749, ESC-1640 variant. Plain Edge - "Hearts on Shield" variety. Charcoal-gray on the obverse with deep multicolored tone that smoothly blanket the reverse surfaces. A rather pleasing example of this scarce 18th century proof sixpence.
Estimate: 900-1100 USD