Netherlands
Willem III gold Proof 10 Gulden 1887, KM106, Proof 66 NGC, an absolute Gem with deeply mirrored surfaces and razor sharp details. Very rare in Proof; we have seen no other sales records. Krause catalog price(s) for this item: $185 in EF, $220 in UNC, $300 in BU.
Estimate: 1500-2000 USD