Watch List notes:

SINCONA BRITISH COLLECTION – PART 4. GREAT BRITAIN. WILLIAM III. AND MARY, 1689-1694.
1/2 Guinea 1690/89, London. Conjoined busts, 90 over 89 in date. 4.05 g. Spink 3430. Bull 383 (R2). Fr. 306. Sehr selten / Very rare. NGC AU55.
(~€ 1'000/USD 1'075)

Finest certified by NGC.