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
Anglo-Saxon pound troy pound of 367.5 g. This pound of 12 ounces was in use in Troyes (Champagne fairs) where the mark of 8 ounces (also the Paris mark) weighed 245 g. The medieval troy pound weighed 240 pennyweights of 1.53 g or 24 medieval troy grains ( of the new pound and heavier than the real barleycorn). The Tower pound remained in use for weighing gold and silver until 1527. Anglo-Saxon pound The pound was a unit of account in Anglo-Saxon England, equal to 240 silver pennies and equivalent to one pound weight of silver. According to the Daily Telegraph it