Collecting Antique and Vintage Scales. Balance Scales include a fulcrum, a beam that balances on it, two pans at the ends of the beam to hold the materials to be weighed, and counter-balancing weights. Balance scales that require equal weights on each side of the fulcrum have been used by everyone from apothecaries and assayers to jewelers and postal workers. The most accurate mechanical equal-arm scales, as they are called, are housed in wood-and-glass cases to keep dust from tipping the scales, so to speak. Firms known for their high-quality balance scales include Philip Harris of England, Becker of Belgium, and U.S. maker Kohlbusch.
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