Grain (unit) weight) refers to those things measured by the lesser but quicker balances: the bismar or uncel, the Roman balance, and the steelyard. The original mercantile pound of 25 shillings or 15 (tower) ounces was displaced by variously the pound of the Hanseatic League (16 tower ounces) and by the pound of the then-important wool trade (16 ounces of 437 grains). A new pound of grains was inadvertently created as 16 troy ounces, referring to the new troy rather than the old troy. Eventually, the wool pound won out. The avoirdupois pound was defined in prototype, rated as to grains. In
Saint Helena pound 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. Initially, the British pound sterling circulated on Saint Helena, with the pound subdivided into 20