<Tr> <Th_colspan="2"> Silver dollar of Ferdinand VII of Spain, 1821 </Th> </Tr> <Tr> <Td> Obverse FERDIN (ANDUS) VII DEI GRATIA 1821 "Ferdinand VII by the Grace of God, 1821 ." Right profile of Ferdinand VII with cloak and laurel wreath . </Td> <Td> Reverse HISPAN (IARUM) ET IND (IARUM) REX M (EXICO) 8 R (EALES) II "King of the Spains and the Indies, Mexico (City Mint), 8 reales ." Crowned Spanish arms between the Pillars of Hercules adorned with PLVS VLTRA motto . </Td> </Tr> <P> The Spanish dollar, also known as the piece of eight (Spanish: peso de ocho or real de a ocho), is a silver coin, of approximately 38 mm diameter, worth eight Spanish reales, that was minted in the Spanish Empire after 1598 . Its purpose was to correspond to the German thaler . </P> <P> The Spanish dollar (so called due to being approximately the same weight and fineness of the Dutch leeuwendaalder) was widely used by many countries as the first international / World currency because of its uniformity in standard and milling characteristics . Some countries countersigned the Spanish dollar so it could be used as their local currency . </P>

How much is a piece of eight worth