Cuba
Republic silver Proof Pattern "Carlos Manuel De Cespedes" Peso 1977 PR62 NGC, KM-Unl. (cf. KM43 for reverse design). We were unable to locate any other examples that have sold in recent years.
https://coins.ha.com/itm/cuba/cuba-republic-silver-proof-pattern-carlos-manuel-de-cespedes-peso-1977-pr62-ngc-/a/3076-31363.s?type=CoinArchives3076
HID02906262019
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Estimate: 1500-2000 USD