Korean yen
The Korean yen was the currency of Korea between 1910 and 1945. It was equivalent to the Japanese yen and consisted of Japanese currency and banknotes issued specifically for Korea. The yen was subdivided into 100 sen. It replaced the Korean won at par and was replaced by the South Korean won and the North Korean won at par.
International status and usage of the euro
In 1998, Cuba announced that it would replace the US dollar with the euro as its official currency for the purposes of international trading. On 1 December 2002, North Korea did the same. (Its internal currency, the wŏn, is not convertible and thus cannot be used to purchase foreign goods. The euro also enjoys popularity domestically, especially among elites and resident foreigners.) Syria followed suit in 2006.