Postage stamps and postal history of Costa Rica change in currency from "Reales" to the new Pesos and "Centavos", the issue of 1863 was surcharged with new values for postal use: 1 Centavos, 2 Centavos, 5 Centavos (all over the Medio Real stamp), 10 Centavos (over Dos Reales) and 20 Centavos (over Cuatro Reales). The 5, 10 and 20 Centavos were also surcharged "U.P.U." Costa Rican stamps were issued overprinted "Guanacaste" in 1885-89 following war with Nicaragua over the sovereignty of Guanacaste. The first issue in the new "Colón" currency was dated 1900 and put into circulation in 1901. It consists of ten stamps with values ranging from
Euro gold and silver commemorative coins special coin: the €100,000 Vienna Philharmonic, only 15 coins minted. Austria uses mainly gold and silver for its collectors' coins. However, since 2003 a special bimetal coin, €25 face value, has been minted using silver and colored niobium, giving this set of coins a unique characteristic, since they have different color variations every year. With the exception of the 2004 Vienna Philharmonic coin and the recently introduced 2008 silver €1.25 Vienna Philharmonic, there is no variation in the number of issues when sorted by face value, from €5 to €100 there is a similar number of issues every year. A