For those of you interested in Korean coins and the DATING SYSTEM used on these coins, take a look at Creounity's Time-Calculator: http://apps.creounity.com/time_machine/index.php?go=korea.php&lang=en Here, you can calculate into Gregorian Calendar the Chosun Dynasty dates, Taehan Empire dates, and the "Tangun" dating-system used on the Hwan coins. This site also goes into the history of the older Korean coins, too. Worth a look even if you have just a passing interest in these coins... For a history of South Korea's Won coins, visit my website at: :hail: http://www.dokdo-research.com/koreancoins.html