Great Britain
William III gold 5 Guineas 1699 AU Details (Surface Hairlines) NGC, Royal mint, KM505.1, S-3454, UNDECIMO edge. Not insignificant markings across the surface, and hence the grade, but still with good detail. Five guineas are always popular, and even considering the hairlines on this piece, it would not necessarily be out of place in a high-quality 5 guinea collection.
Estimate: 15000-20000 USD