Brazil
Afonso VI countermarked revalidation 500 Reis ND (1663) XF45 NGC, KM37, Gomes-44.03. 21.53gm. Crowned "500" countermark (AU Standard) upon Porto mint, Portugal 400 Reis (Cruzado) of João IV (1640-1656), applied upon these coins per law of March 22, 1663 (and later per edict of July 7, 1663 in Brazil) to raise their value by 25%. Quite nice for the issue, with mild wear and hints of luster remaining.
https://coins.ha.com/itm/brazil/brazil-afonso-vi-countermarked-revalidation-500-reis-nd-1663-xf45-ngc-/a/61162-99131.s?type=CoinArchives61162
HID02906262019
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Estimate: 500-1000 USD