Korean and chinese dating
In 1331, during the reign of Ch'unghyewang(忠惠王), bottle-shaped pieces of silver alloyed with copper and weighing about 454 grams were introduced as a form of money.Each of these bottle-shaped "coins" was worth the equivalent of one hundred pieces of linen.The coin has the same Chinese character inscription, 乾元重寶 (, were added to the reverse side of the coin to indicate that the coin was from Korea which is a country east of China.There is some controversy, however, concerning who actually produced the coin since no ancient Korean historical references mention it and the coin did not appear in any coin catalogues until 1938 when a Japanese coin catalogue (東亞錢志) attributed it as being Korean.Unfortunately, no historical records exist from Bohai (Balhae) in regard to its coinage.During the period 998-1009 AD, another coin was produced which was also based on a Chinese coin.Coins were again cast during the 3rd year (1625 AD) of the reign of King Ingo.
Korea issued its first paper money in the year 1401 during the reign of T'aejong (太宗).
King Sukjong (silver vases were very popular with the aristocracy for use in large-scale transactions and to pay bribes.
Unfortunately, no specimens are now known to exist.
Some experts believe that these coins were actually cast by a Chinese state known as Bohai (渤海国) which existed in the area during the period 698-926.
The Koreans consider the state to have been a Korean kingdom known as Balhae ().