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
1 euro coin Malta did not issue €1 coins in 2009. Slovenia and Slovakia have produced coins every year since their respective entries to the eurozone. Proof €1 coins are minted by the majority, but not all, of the eurozone states. One of the most valuable planned issues of a €1 coin was by Vatican City in 2002, which may sell for several hundred euros. However, the French mint marks were mistakenly not placed on some 2007 Monaco coins which are hence worth more than €200 to collectors. PP means the proof-condition coins. Numbers means if more than one coin was minted in