Heritage Auctions, Auction 65181, Los 98025 Bulgaria
Republic copper-nickel Proof Proba "Ribbon Dancing" 10 Leva 1984 PR68 Ultra Cameo NGC, Sofia mint, KM-Pn28. An exciting "Proba I" (Pattern) issue, this type struck in copper-nickel, not silver. A low-mintage piece that rarely surfaces at auction, this particular specimen being excellently preserved at such a lofty tier of Gem Proof. ...