Bolivia
Republic gold Proof Piefort 4000 Pesos 1979 PR68 Ultra Cameo NGC, Valcambi mint, KM-P10. Superb Gem Proof with frosty surfaces, impressively deep Cameo effect and essentially flawless surfaces, as suggested by the technical designation. A great modern rarity with a mintage of only 47 pieces and currently the single example certified by NGC.
Estimate: 2500-3000 USD