Clamp money tin ingot currency

Obverse description	Cast tin ingot of elongated, straight clamp form with three upward-projecting lug ears: two at the terminal ends and one centrally positioned along the upper edge. The body presents a cylindrical, slightly flattened profile with rounded shoulders, the surface exhibiting characteristic casting roughness, pitting, and natural oxidation patina consistent with aged tin alloy. The lower face is concave and irregular, reflecting the open-mould casting technique employed. No inscriptions, devices, or decorative elements are present; the form itself served as the primary indicator of value.
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Reverse description	The reverse presents the underside of the cast ingot, displaying a similarly irregular and rough surface with pronounced casting seams, porosity, and dark oxidation patina. The concave lower profile and unfinished texture are typical of Southeast Asian primitive tin currency produced by open-mould casting. The three lug projections are visible in profile at the two ends and centre, confirming the symmetrical three-ear clamp morphology. No legends, marks, or devices are present on this face.
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Mintage	ND (1400-1700)
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