SINCONA BRITISH COLLECTION – PART 4. GREAT BRITAIN. CHARLES II. 1660-1685.
1/2 Guinea 1681, London. Second laureate bust. 4.00 g. Spink 3348. Bull 303 (R). Fr. 290. Selten / Rare. Bearbeitet / Tooled. NGC AU Details.
(~€ 500/USD 540)
Apparently the only coin of this type certified by NGC.