Portugal
Republic gold Proof "Diogo Cão" 100 Escudos 1987-INCM PR69 Ultra Cameo NGC, KM641b, Fr-160. Mintage: 5,387. A commemorative issue celebrating the golden age of Portuguese discoveries, specifically the famed explorer Diogo Cão, who was the first European to navigate the West African coast near Gabon. AGW 0.7075 oz.
https://coins.ha.com/itm/portugal/portugal-republic-gold-proof-diogo-cao-100-escudos-1987-incm-pr69-ultra-cameo-ngc-/a/3096-31151.s?type=CoinArchives3096
HID02906262019
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Estimate: 600-800 USD