||Willem III gold Proof 10 Gulden 1850, KM95, Fr-340, Proof 63 NGC. A two-year type and proof-only date with watery reflectivity in the fields and a full strike that crisply details all the devices. Delicate patina produces a soft orange hue when turned against a light, adding to the eye-appeal. A key date and a rare treat for the Dutch collector. Ex: ?Colonel? E.H.R. Green; Green Estate? Partnership of Eric P Newman / B.G. Johnson.
Realized $9,987.50. Description courtesy of Heritage Auctions.