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拍品专文
Coin-operated strength testers first appeared with Robert William Page's patent of 1885. By measuring a force applied to a spring or counter-weight, they were in principle similar to weighing scales, although not required to be as accurate. They came in many shapes and sizes, and were very popular in the hard living, working class culture of the industrial age. An alternative to arm wrestling, they could be used to settle wagers or impress the opposite sex with demonstrations of physical prowess.