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
Sudanese pound Sudanese pound The Sudanese pound (Arabic: ") is the basic unit of the Sudanese currency. The pound consists of 100 piasters. The pound is issued by the Central Bank of Sudan. Its value is linked to gold and convertible into foreign currencies. There are no restrictions on money transfers to and from Sudan. The Sudanese pound is equivalent to $ 0.021. It has been pegged to the United States dollar since around 1984. The pound fell for the first time since 1997 after the United States imposed economic sanctions on Sudan. The Sudanese pound continued its decline to an unprecedented