The coins are composed of an alloy called
Nordic gold, with a diameter of 24.25 mm, a 2.38 mm thickness and a mass of 7.80 grams. The coins' edges have regular indentations. 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.
Reverse (common) side The reverse (used from 2007 onwards) was designed by Luc Luycx and displays a map of Europe on the left. The map does not include
Iceland and cuts off on the right through Russia (exactly, at a line from the
Kandalaksha Gulf to the
Bosphorus (Cyprus is moved westward under
Crete in order to include it and Malta is shown as disproportionally large so that it shows up). The map is flat and level with most of the coin and the sea is shown as an indentation. Six fine lines cut through the sea, breaking when passing through the map, and at their ends at the top and bottom are twelve stars (reflective of the
flag of Europe). To the right, in raised lettering, is "50 Euro Cent" with the '50' being shown much larger than the words. The designer's initials, LL, appear next to the 0 in 50.
Luc Luycx designed the original coin, which was much the same except the design was only of the then 15 members and shown with gaps between the states and raised rather than with an indented sea. Starting in 2025 coins from individual member states have started adjusting their common side design to a new version, identified by smaller and more rounded numeral "5" and longer lines outside of the stars at the coin's circumference.
Obverse (national) sides The obverse side of the coin depends on the issuing country. All have to include the name or an abbreviation of the issuing country. The national side of circulation coins shall bear a circle of 12 stars that shall fully surround the national design, including the year mark and the indication of the issuing Member State’s name. The side cannot repeat the denomination of the coin unless the issuing country uses an alphabet other than
Latin. Currently,
Greece,
Cyprus and
Bulgaria are the only such countries. Greece engraves "50 ΛΕΠΤΑ" (50 lepta) on its coins and Bulgaria engraves "СТОТИНКИ" (stotinki).
Austria ignores this rule, engraving "50 EURO CENT" on its coins, hence will have to change its design to comply this rule.
Belgium,
Finland,
France,
the Netherlands and
Spain minted coins dated 1999, 2000 and 2001 although these entered circulation in 2002.
Monaco minted coins dated 2001 although these entered circulation in 2002 too.
Potential designs Austria, Germany and Greece will also at some point need to update their designs to comply with guidelines stating they must include the issuing state's name or initial, and not repeat the denomination of the coin (Austria only). On the other hand, Slovenia and Greece have to comply with the star rule. In addition, there are several EU states that have not yet adopted the euro, some of them have already agreed upon their coin designs however it is not yet known exactly when they will adopt the currency, and hence these are not yet minted. See
enlargement of the Eurozone for expected entry dates of these countries. ==References==