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
Silver and gold diadem from the tomb of Philip II able to fill it with the metals they wished to use. The gilding process that most likely would have been used on this diadem would have involved gold leaf being burnished to the silver. The adhesion of gold with the use of heat helps promote interdiffusion with the underlying metals which usually consist silver or copper. While examining the diadem the most notable feature is the Herakles knot located on the front imitating a cloth headband. The knot is a reminder that the Macedonian king was a religious leader and direct descendant of the Greek hero and his father Zeus,