This is an 8 Reales silver cob coin minted in Potosi, Bolivia, between 1622 and 1629 during the Spanish colonial period. The coin bears the denomination of Real and is certified by NGC as Very Fine (VF). The obverse of the coin features the Spanish coat of arms, while the reverse displays the Pillars of Hercules and the mintmark "P". This coin is a valuable piece of history and is sought after by collectors and enthusiasts of Spanish colonial coins.