Brazil
Republic "Santos Dumont Flight Anniversary" Countermarked 960 Reis 1956 UNC Details (Cleaned) NGC, KM-XCC11.1. C/S (UNC Strong). Counterstamped upon 960 Reis host dated 1815-B. Lustrous with iridescent toning.
https://coins.ha.com/itm/brazil/brazil-republic-santos-dumont-flight-anniversary-countermarked-960-reis-1956-unc-details-cleaned-ngc-/a/61181-97111.s?type=CoinArchives61181
HID02906262019
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Estimate: 100-150 USD