|Brown & Sharpe (B & S Gauge)|
|Avoirdupois Weight System|
Avoirdupois is a weight system, utilized by the United States and England, for measuring commodities except precious metals, precious stones and medicines. The unit weight is the pound and is equivalent to 16 ounces.
|Troy Weight System|
Troy weight is a system of measurement for precious metals, precious stones etc. where a pound is equivalent to 12 ounces. The name "Troy" is derived from Troyes, France, the city where the system was first used.