Watch List notes:

Panama (struck in Philadelphia), proof platinum 150 balboas, 1976, Sesquicentennial of the Congress of Panama, encapsulated NGC PF 69 Ultra Cameo. KM-43. Gorgeous mirror fields and frosty details, totally devoid of any marks or flaws to our eyes, with elegant portrait of Simon Bolivar on obverse.

Estimate: $400 - 600