Overview
In international finance, a world currency, supranational currency, or global currency is a currency that would be transacted internationally, with no set borders.
History
First European Banknotes (17th century)
The first European banknotes were issued in 1661 by Stockholms Banco. Founded by Johan Palmstruch, it was a predecessor of Sweden's central bank Sveriges Riksbank. As commercial activity and trade shifted northward in 17th century Europe, deposits at and notes issued by the Bank of Amsterdam denominated in Dutch guilders became the means of payment for much trade in the western world.
Spanish dollar (17th – 19th centuries)
From Wikipedia (CC BY-SA 4.0).