Troy weight Troy weight Troy weight is a system of units of mass customarily used for precious metals and gemstones. One troy ounce (abbreviated "t oz" or "oz t") is equal to exactly , (or about 1.0971 oz. avoirdupois, the "avoirdupois" ounce being the most common definition of an "ounce" in the US). There are only 12 troy ounces per troy pound, rather than the 16 ounces per pound found in the more common avoirdupois system. The avoirdupois pound has 7000 grains whereas the troy pound has only 5760 grains (i.e. 12 × 480 grains). Both systems use the same grain defined
New Jersey pound to 4 shillings 6 pence sterling. This made a colonial schilling equivalent to nine pence sterling and a colonial pound equivalent to 2 troy oz 18 dwt 8 gr (1,400 grains / 90.7 grams) of silver. Currency issued at this rate was referred to as “Proclamation Money”. The currency of colonial New Jersey consisted of bills of credit which circulated as legal tender. Each issue was inscribed with the weight of silver it was current for. The initial 1709 issue passed at the rate of 2½ ounces of silver per New Jersey Pound, but issues after 1724 had inscriptions with