The most ancient relics of a weighing scales have been discovered in the Indus River Valley, near present day Pakistan, dating back to around 2,000 B.C. As trade developed during the ancient times, merchants developed a need to assess the value of goods such as crops, clothing and gold, in order to barter for their goods. The early devices used a simple, yet effective, system which relied on balancing goods. They consisted of two plates attached to an overhead beam which was fixed on a central pole. Measurements were taken by placing the measured object on one plate and weight stones on the other, until an equilibrium was reached.
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