Uruguay
Republic gold Proof Pattern 20 Centesimos 1976-So PR66 Ultra Cameo NGC, Santiago mint, KM67b. Gold striking of KM67. Boasting a trivial mintage of just 50 examples and wholly deserving of its assigned "Ultra Cameo" superlative, expressing jet-black mirrors and highly frosted raised designs.
https://coins.ha.com/itm/uruguay/republic-gold-proof-pattern-20-centesimos-1976-so-pr66-ultra-cameo-ngc-/p/3093-134003.s?type=DA-DMC-CoinArchives-WorldCoins-3093-10282021
HID02906262019
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Estimate: 1200-1800 USD