Pound (mass) for the weight of certain precious metals, especially in the trade; these are normally quoted just in ounces (e.g. "500 ounces") and, when the type of ounce is not explicitly stated, the troy system is assumed. Historically, the pound sterling was a Tower pound of silver. In 1528, the standard was changed to the Troy pound. The avoirdupois pound, also known as the wool pound, first came into general use c. 1300. It was initially equal to 6992 troy grains. The pound avoirdupois was divided into 16 ounces. During the reign of Queen Elizabeth, the avoirdupois pound was redefined as
Saint Helena pound can take place. Indicative rates for other currencies can be obtained as follows: Notes Sources Saint Helena pound The Saint Helena pound is the currency of the Atlantic islands of Saint Helena and Ascension, which are constituent parts of the British overseas territory of Saint Helena, Ascension and Tristan da Cunha. It is fixed at parity with the pound sterling and as such both currencies are commonly accepted and circulated. It is subdivided into 100 "pence". Tristan da Cunha, the third part of the territory, officially adopted the Pound sterling. However, there are occasionally commemorative coins minted for the island.