Watch List notes:

Panama, copper-nickel clad copper 1 balboa, 1982, Vasco Nunez de Balboa, error fineness "0.500" (silver), very rare. KM-39.4. 22.64 grams. Mint State with muted luster, rainbow-toned reverse, minimal marks, from a mintage of only 11 pieces. Pedigreed to the Richard Stuart collection. (Estimate: $500 - 750)