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
Currency of Maldives first coins were of silver and fairly coarse. Later, coins of copper and lead were put into circulation. Gold coins were also struck by Sultan Hassan Nooraddin (1779-1799). Said to be the finest struck at the Maldive mint, the two denominations of gold coins issued by Sultan Hassan Nooraddin, known as the "mohori" and "bai mohori", were never put into circulation. The Maldivian unit of currency is the rufiyaa (ISO 4217 code MVR, symbol "Rf."), introduced in 1947. The rufiyaa is divided into 100 laari. On 1 February 2009, the exchange rate with the US dollar was USD1.00 = MVR12.80.