Great Britain
George VI Proof Crown 1937 PR67 Cameo PCGS, KM857, S-4079. The highest grade level for this type at either NGC or PCGS, and bearing the coveted 'Cameo' certification. Pure, icy white in appearance with not a hint of toning.
https://coins.ha.com/itm/great-britain/great-britain-george-vi-proof-crown-1937-pr67-cameo-pcgs-/a/3081-30886.s?type=CoinArchives3081
HID02906262019
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Estimate: 1500-1800 USD