Obverse: The obverse of the coin features the portraits of King Juan Carlos I of Spain and Queen Sofia. Above, the names of the king and queen, JUAN CARLOS I Y SOFÍA, are inscribed, and below, the country name ESPAÑA and the coin's release year, 2009.
Reverse: The reverse depicts bands forming the number 10 and the euro symbol. A circle formed by 12 stars is also shown. To the right of the central motif is a large star with a crowned letter M, indicating the mint, and the digits 09. Above is the inscription X ANIVERSARIO UNIÓN ÉCONÓMICA Y MONETARIA, and below is the denomination 12 EURO.
About the Coin: This silver coin was issued to mark the 10th anniversary of the Eurozone.