Euro coins edge of the €2 coin also protects it from counterfeiting. Euro coins were designed in cooperation with organisations representing blind persons, and as a result they incorporate many features allowing them to be distinguished by touch alone. In addition, their visual appearance is designed to make them easy to tell apart for persons who cannot read the inscriptions on the coins. The coins increase in size and weight with value. Of the eight denominations of euro coins, the three lowest denominations are small, resemble copper in colour and are quite thin and light. The next three denominations resemble gold in
Korean mun For this reason even all 100 mun coins also bear the inscription of "常平通寶", giving every coin from this period exactly the same obverse. As records weren't actively kept it's currently unknown how many different variants were cast, and how much of each respective denomination (with the notable exception of the 100 mun coin, of which a total of 1,784,038 were minted). There are 3,078 varieties of the 1, 2, and 5 Mun denominations, and 48 varieties of the 100 Mun denomination documented by the authoritative Korean coin catalogue (Hanja: 高麗朝鮮時代貨幣; Hangul: ), while there are estimated more than 5,000