Design
The coins are composed of two alloys. The inner circle is composed of three layers (copper-nickel, nickel, copper-nickel) and the outer ring of nickel brass giving them a two colour appearance. The diameter of the coins are 23.25 mm, a 2.33 mm thickness and a mass of 7.5 grams. The coins' edges consist of alternating segments, three smooth, three finely ribbed. The coins have been used from 2002, though some are dated 1999 which is the year the euro was created as a currency, but not put into general circulation.
Read more about this topic: 1 Euro Coins
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