Sweden
Oscar II gold Proof 20 Kronor 1889-EB PR65 NGC, Stockholm mint, KM748 (unlisted in Proof), Fr-93a, SGM-20. An extraordinarily rare issue in gem Proof, undocumented as such by the Standard Catalog of World Coins, though known in Robert Delzanno's recent publication Sveriges Guldmynt. Evincing silky-smooth mirrored surfaces that radiate with a light tinge of amber, this is the sole Proof of this date we have been able to locate, and the only such certified by NGC. Sure to encounter much demand from collectors of Swedish coinage.
From the Caranett Collection
https://coins.ha.com/itm/sweden/sweden-oscar-ii-gold-proof-20-kronor-1889-eb-pr65-ngc-/a/3083-30628.s?type=CoinArchives3083
HID02906262019
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Estimate: 2500-3500 USD