West Friesland, Netherlands, "rider" ducatoon, 1676, encapsulated NGC MS 63, finest known in NGC census. Lustrous and devoid of wear but with some weak strike on high points and spots of surface roughness (as made), still the best (and only) specimen at NGC, with light incipient toning. Interestingly, the date appears to be 1676/6761, initially engraved backwards!
Estimate: $600 - 900