Great Britain
Elizabeth II gold Proof "Britannia" 500 Pounds (5 oz) PR70 Ultra Cameo NGC, KM-Unl. An immaculate example of the type, struck in 5 troy ounces of .9999 fine gold and replete with both perfect mirrored fields and a sublime cameo contrast. One of the first ten struck, per the NGC insert.
https://coins.ha.com/itm/great-britain/great-britain-elizabeth-ii-gold-proof-britannia-500-pounds-5-oz-pr70-ultra-cameo-ngc-/a/3085-31692.s?type=CoinArchives3085
HID02906262019
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Estimate: 9000-11000 USD