Spanish Piece of Eight Silver Coin

Type Object Region Spain Time 1497–1730

The Spanish piece of eight (real de a ocho) was a high-purity silver coin introduced by Castilian currency reform in the late 15th century, standardi…

Timeline

1497–1500Seville · SevilleFerdinand and Isabella issued currency edicts unifying silver coin fineness and weight standards, introducing the large eight-real coin to replace the previously chaotic local coinages, providing a stable currency base for overseas trade expansion.
c. 1500–1545Seville–Americas route · Spain–Americas trade routeWith colonial development in the Americas, the piece of eight entered the transatlantic trade system through the port of Seville, used to pay for colonial supplies, military pay, and tribute, becoming the primary currency of early economic circulation in Spanish America.
1545–1650Potosí · PotosíRoyal mints in Mexico City, Potosí, and elsewhere mass-produced the piece of eight from American silver; soaring output drove the coins into Asia via routes such as the Manila galleons, making them a global trade currency.

Sources

Spanish dollar https://en.wikipedia.org/wiki/Spanish_dollar
Pieces of Eight: The Monetary History of Spain and Spanish America — Carlos A. Jaramillo