Great Britain
George IV Proof Crown 1826 PR63 PCGS, KM699, S-3806, ESC-2336 (R), L&S-28. SEPTIMO edge. From a minuscule original mintage of 150 pieces, this Proof-only emission with its spectacular reverse leaves to shame the modern efforts to replicate its grandiose flourish. At first glance the rich patination appears almost anthracite, but a good light and a turn of the wrist reveals delicate royal blue and stormy purple undercurrents permeating the glossy fields. Certainly a great rarity, and a superb addition to any ambitious cabinet of pre-Victorian coins.
https://coins.ha.com/itm/great-britain/great-britain-george-iv-proof-crown-1826-pr63-pcgs-/a/3105-32218.s?type=DA-DMC-CoinArchives-WorldCoins-3105-01092023
HID02906262019
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Estimate: 15000-20000 USD