Sweden
Oscar II gold Proof 5 Kronor 1901-EB PR66 Cameo NGC, Stockholm mint, KM766 (unlisted in Proof), AAH-40, SGM-51. Essentially impeccable and undeniably Proof, delicate but clear frost overlaying the devices while the fields exhibit a deeply mirrored finish. The sole example of this one-year type in Proof format that we have been able to locate, and the only piece so certified by NGC.
Ex. Mortimer Hammel Collection (Stack's September 1982, Lot 646)
From the Caranett Collection
https://coins.ha.com/itm/sweden/sweden-oscar-ii-gold-proof-5-kronor-1901-eb-pr66-cameo-ngc-/a/3085-30311.s?type=CoinArchives3085
HID02906262019
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Estimate: 3000-5000 USD