Great Britain
George IV Proof "Barton's Metal" Obverse Uniface Trial Sovereign 1825 PR63 NGC, cf. W&R-235 (for obverse), Marsh-10D (same, R5) . Edge plain, struck in gold-electrolyzed copper also known as "Barton's metal". An immensely desirable offering with the sculptured, gently frosted portrait of the King raising in admirable relief from the reflective fields, in lasting tribute to William Wyon's legendary engraving skills that continue to be celebrated even today.
Ex. Murdoch Collection
https://coins.ha.com/itm/great-britain/great-britain-george-iv-proof-barton-s-metal-obverse-uniface-trial-sovereign-1825-pr63-ngc-/a/3107-31515.s?type=DA-DMC-CoinArchives-WorldCoins-3107-05032023
HID02906262019
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