Cuba
Republic Proof "Postal History of Cuba - Sailing Ship" 10 Pesos 1992 PR67 Ultra Cameo NGC, KM370.
From the El Don Diego Luna Collection
https://coins.ha.com/itm/cuba/cuba-republic-proof-postal-history-of-cuba-sailing-ship-10-pesos-1992-pr67-ultra-cameo-ngc-/a/61155-97167.s?type=CoinArchives61155
HID02906262019
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Estimate: 100-150 USD