Monaco
Rainier III gold Essai 20 Centimes 1962-(a) MS62 NGC, KM-E48, Gad-147. Struck from a tiny mintage of only 502 examples on a specially prepared gold planchet imbued with semi-Prooflike features and strike.
https://coins.ha.com/itm/monaco/monaco-rainier-iii-gold-essai-20-centimes-1962-a-ms62-ngc-/a/3091-32716.s?type=CoinArchives3091
HID02906262019
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Estimate: 1000-1200 USD