Spain 10 Euro 2007 50th Anniversary of the Treaty of Rome. 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 · 2007 ·. Reverse: The map of Europe is reproduced; showing two stages of European construction in different textures: first; the six founding countries; signatories of the Treaty of Rome and; in another texture; the rest of the countries members incorporated successively until 2007. Lettering: 50 ANIVERSARIO EUROPA 10 EURO M TRATADO DE ROMA. Silver(.925) 27g. KM 1135