East Caribbean dollar
It has existed since 1965, when it replaced the British West Indies dollar, and it is normally abbreviated with the dollar sign $ or, alternatively, EC$ to distinguish it from other dollar-denominated currencies.
Members of the Currency Union [change]
Six of the eight countries which use the EC$ are independent (Antigua and Barbuda, Dominica, Grenada, Saint Kitts and Nevis, Saint Lucia, and Saint Vincent and the Grenadines). The other two are British overseas territories: Anguilla and Montserrat.
All of the countries except Dominica are Commonwealth realms.