Troy weight A grain is 20 mites, a mite is 24 droits, a droit is 20 perits, a perit is 24 blanks. In Scotland, the Incorporation of Goldsmiths of the City of Edinburgh used a system in multiples of sixteen. ("See Assay-Master's Accounts, 1681–1702, on loan from the Incorporation to the National Archives of Scotland".) Thus, there were 16 drops to the troy ounce, 16 ounces to the troy pound, and 16 pounds to the troy stone. The Scots had several other ways of measuring precious metals and gems, but this was the common usage for gold and silver. The Pound was
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