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Five baht coins were first minted in the fifth year of Emperor Yuanshou of the Western Han Dynasty (before 1 18), weighing five baht, hence the name. Qian Wen "five baht". Also called five baht. Divided around the square hole, it is generally right "five" and left "baht". Its standard weight is 4g, its diameter is 2.5cm and its thickness is 0. 12cm.