Bullet money orbullet coins, known in Thai asphotduang (Thai:พดด้วง;pronounced[pʰót.dûaŋ], also spelledpod duang, etc.), were a type of coinage historically used in Siam (nowThailand) and itspredecessor kingdoms. They were almost exclusively made of silver, in the form of a bar bent into a roundish shape, and stamped with certain marks.Photduang were issued according to thebaht system of weights, known among Westerners as thetical, which is the basis of themodern Thai currency. Their earliest common use is from theSukhothai Kingdom (13th–15th centuries), and they were used byAyutthaya and its successor kingdomsThonburi andRattanakosin up until 27 October 1904, when their use was discontinued in favour of flat coinage.[1][2][3][4]
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