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
Chinese Gold and Silver Exchange Society Chinese Gold and Silver Exchange Society The Chinese Gold and Silver Exchange Society is an organisation of gold trading firms in Hong Kong who are participants of the Chinese Gold and Silver Exchange, the first exchange in Hong Kong. The CGSES was formally established as an organisation in 1910. Its founders were immigrants from mainland China. It eventually stopped trading silver, but gold trading saw significant growth after 1974 when the government loosened legal restrictions, and by 1979 trading volume was roughly one million ounces per day, making it one of the world's four largest gold trading centres along with