Unit of account L.S.D units in ratio 240:12:1. The Florentine gold florin, the French franc and the electoral rheingulden all became pounds (240 denari) of account. Units of account would often survive over 100 years despite the original coins changing composition and availability (e.g. the Castilian maravedi). A modern unit of account is the European Currency Unit, used in the European Union from 1979 to 1998; its replacement in 1999, the Euro, was also just a unit of account until the introduction of notes and coins in 2002. Unit of account is the main way of calculating a carrier or ship owner's liability
Korean currency also got devaluated. This was the reason for the reintroduction of won in 1962 as the official currency unit. South Korean currency was still pegged to the US dollar until in 1997 when it was floated into the world market. The Joseon Dynasty issued its first copper coins. In 1888, shortly before the yang was introduced, a small number of coins denominated in hwan (圜) and mun (文) were minted. Even though the yang had been used in past it was reintroduced as the main currency in 1892. One yang was subdivided in 100 fun, making it the first Korean