Great Britain
Elizabeth II gold Proof "Sir Isaac Newton - 375th Anniversary of Birth" 50 Pence 2017, KM-Unl. Mintage: 634. Sold with original box of issue and COA #020. AGW 0.4565 oz.
https://coins.ha.com/itm/great-britain/great-britain-elizabeth-ii-gold-proof-sir-isaac-newton-375th-anniversary-of-birth-50-pence-2017-/a/61276-98168.s?type=DA-DMC-CoinArchives-WorldCoins-61276-06262022
HID02906262019
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