sentences:  At its introduction, it was pegged to the United States dollar at 1 dollar = 60 hwan, but toward the end of its life it was devaluated at 1 dollar = 1250 hwan.In 1962, the won was reintroduced at the rate of 1 won = 10 hwan.The 10 and 50 hwan coins were kept in circulation until March 21, 1975.