Sweden
Carl XV Proof 25 Ore 1867/6-ST PR66 Cameo NGC, KM712. Obv. Head of Carl XV right. Rev. Crowned date and value in wreath. This piece seems to be the 1867/6 overdate variety, despite not being noted as such on the holder. Well struck, frosted devices, with deeply mirrored fields. Bright white surfaces, with hints of russet toning around the obverse periphery. Extremely rare in Proof and the only example certified by NGC and PCGS combined.
https://coins.ha.com/itm/sweden/sweden-carl-xv-proof-25-ore-1867-6-st-pr66-cameo-ngc-/a/3076-32252.s?type=CoinArchives3076
HID02906262019
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Estimate: 1000-1200 USD