Spain 10 Euro 2004 European Union enlargement. Juan Carlos I (1975-2014). Obverse: Portrait of S. M. the King of Spain; Don Juan Carlos I. Lettering: JUAN CARLOS I REY DE ESPAÑA · 2004·. Reverse: Map of Europe is represented by the names of the new countries that access the European Union: Estonia; Latvia; Poland; Hungary; the Czech Republic; Lithuania; Slovakia; Slovenia; Malta, and Cyprus. Lettering: 10 EURO M ESTONIA LETONIA POLONIA HUNGRIA REPUBLICA CHECA LITUANIA ESLOVAQUIA ESLOVENIA MALTA CHIPR. Edge Reeded. Silver (.925) 27g. KM 1099