France
Republic platinum Proof Piefort 50 Francs 1978 PR66 Ultra Cameo NGC, Paris mint, KM-P621. Mintage: 25. A delightfully mirrored gem, admirably preserved and with contrasting fields and devices yielding a stark cameo effect. Sold with original certificate of authenticity numbered "IX".
https://coins.ha.com/itm/france/france-republic-platinum-proof-piefort-50-francs-1978-pr66-ultra-cameo-ngc-/a/3085-30125.s?type=CoinArchives3085
HID02906262019
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Estimate: 6000-8000 USD