France
Republic platinum Proof Piefort 50 Francs 1979 PR67 Cameo NGC, Paris mint, KM-P652. Struck to a documented mintage of only 30 examples. Lightly frosted over the devices, resulting in a subtle cameo effect. Sold with original mint certificate numbered "XXVI".
https://coins.ha.com/itm/france/france-republic-platinum-proof-piefort-50-francs-1979-pr67-cameo-ngc-/a/3085-30126.s?type=CoinArchives3085
HID02906262019
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Estimate: 6000-8000 USD