Japan Billon Mameitagin "Bean Money" (Large)

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In the pre-modern era of Japan, currency took on forms that challenge our modern expectations of perfectly round, uniform coinage. Among the most intriguing of these historical currencies is the Mameitagin, often translated as bean money. Produced from the seventeenth century through the middle of the nineteenth century, these non-uniform billon pieces represent a highly tactile and organic approach to monetary design. This specific large-scale specimen is crafted from a silver alloy of varying purity. Unlike machine-struck coins, each piece of bean money has its own individual character, with this substantial example weighing in at more than 10 grams. The metal content contains approximately 0.0800 troy ounces of pure silver within its unique, irregular shape. The surface of the coin tells the story of its manufacture and authorization. The obverse side is stamped with official treasury marks and an era stamp, validating its use in commerce. In contrast, the reverse remains a rough, unadorned blank surface, showcasing the raw texture of the metal as it cooled centuries ago. This certified genuine piece offers a direct connection to the daily commerce of historical Japan.