Costa Rica
Republic gold Proof "Public Education Centennial" 500 Colones 1970 PR68 Ultra Cameo NGC, Italcambio mint, KM198, Fr-24. A low-mintage Proof issue of 3,507 pieces, essentially flawless with frosty cameo devices set upon deeply mirrored fields. This issue was struck to celebrate the 100th anniversary of free and compulsory public education in Costa Rica.
Estimate: 3000-3400 USD