Denmark
Christian X gold Proof 10 Kroner 1913 (h)-VBP PR66+ Cameo NGC, Copenhagen mint, KM816 (unlisted in Proof), Hede-2, Sieg-3. The highest level of certification awarded to any 10 Kroner of Christian X--across both business strikes and Proofs--at NGC, and a praiseworthy representative.
From the Caranett Collection
https://coins.ha.com/itm/denmark/denmark-christian-x-gold-proof-10-kroner-1913-h-vbp-pr66-cameo-ngc-/a/3081-30439.s?type=CoinArchives3081
HID02906262019
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Estimate: 2500-3500 USD