1 Mon 'Gindaitsūhō' 銀代通寳

Obverse description	Cast copper cash-type coin featuring a central square perforation surrounded by a raised inner rim. Four Chinese characters are arranged in cruciform fashion around the central hole, reading clockwise from the top: 銀 (gin, silver), 通 (tsū, circulating), 寳 (hō, treasure), and 代 (dai, substitute), forming the legend 銀代通寳 (Gindaitsūhō). The characters are rendered in a bold, slightly archaic clerical script style typical of Edo-period Japanese cast coinage. The field is flat and unadorned, framed by a plain raised outer rim. The overall design follows the classical East Asian cash coin format.
Obverse script	Chinese
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Reverse description	Plain reverse featuring a central square perforation enclosed by a raised square boss, which is in turn surrounded by a broad, slightly concave recessed field and a plain raised outer rim. No inscriptions, symbols, or decorative elements are present. The surface exhibits the characteristic texture of cast copper coinage from the Edo period.
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