Dominican Republic, silver proof pattern 500 pesos, 1976, plain edge, first American visit of the King and Queen of Spain, NGC PF 69 Ultra Cameo, finest known in NGC census.KM-X1e.No marks or wear but the surface infinitesimally gritty, still the finest you can get and one of only sixteen graded by NGC in silver proof.From: Dominican Republic
($200-300)