Specifically, this was introduced as early as 1380 and became the official Portuguese currency in 1433. The first is undoubtedly the Portuguese Real in the plural called Reis, which was the official currency of Portugal from the fifteenth century. Portuguese numismatics has known throughout its history basically three major currencies. All the Portugal Euro Coins Brief History of Portuguese Numismatics We will see as usual the specifications, description and especially the rarity and value of all the Portuguese Euro Coins. On this page we will see the series of Portugal Euro Coins, composed of 8 divisional coins, three “red”, three “yellow” and two bimetallic coins. Coins Online Auction: How does it work?.