Troy weight g, 12 oz t), while an avoirdupois pound is approximately 21.53% heavier at 7 000 grains (≈ 453.59 g). One troy ounce (oz t) is equal to grams. Also equal to avoirdupois ounces, exactly , or about 10% larger. The pennyweight symbol is "dwt". There are 24 grains in 1 dwt, and 20 dwt in one troy ounce. Because there were 12 troy ounces in the old troy pound, there would have been 240 pennyweights to the pound—the basis of the fact that the old British pound sterling of currency contained 240 pence. (However, prior to 1526, English pound sterling
Actual silver weight $15.00 per troy ounce, the intrinsic value of a pre-1965 Roosevelt dime would be: 0.072339075 × 15.00 = $1.085086125 ≈ $1.09. (Note that coin stores, pawn shops, and bullion retailers will not necessarily purchase coins from consumers at the intrinsic value because of the costs involved with selling such coins to companies that melt the coins, separate the constituent metals, and prepare the silver for resale.) Actual silver weight Actual silver weight, usually abbreviated ASW, refers to the weight of pure silver contained in a coin, measured in troy ounces. Coin collectors, individuals who invest in bullion coins, and others