Pound (mass) No standards of the Tower pound are known to have survived. The Tower pound was equivalent to about 350 grams. The merchants' pound ("mercantile pound", "libra mercantoria", or "commercial pound") was considered to be composed of 25 rather than 20 Tower shillings of 12 pence. It was equal to 9,600 wheat grains (15 tower ounces or 6,750 grains) and was used in England until the 14th century for goods other than money and medicine ("electuaries"). The London pound is that of the Hansa, as used in their various trading places. The London pound is based on 16 ounces, each ounce
Pound (mass) Jersey from the 14th century to the 19th century. It was equivalent to about 7,561 grains (490 grams). It may have been derived from the French livre poids de marc. The trone pound is one of a number of obsolete Scottish units of measurement. It was equivalent to between 21 and 28 avoirdupois ounces (about 600-800 grams). In many countries, upon the introduction of a metric system, the pound (or its translation) became an informal term for 500 grams. In German, the term is "Pfund", in French "livre", in Dutch "pond", in Spanish and Portuguese "libra", in Italian "libbra", and