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Joseon
Sangpyeong Tongbo
100 Mun
朝鮮
常平通寶
一百文
Item number: A2303
Year: AD 1866-1867
Material: Brass
Size: 40.0 x 40.4 x 2.1 mm
Weight: 21.3 g
Provenance: Spink 2023
This is a Sangpyeong Tongbo coin with a denomination of 100 mun, minted during the 3rd year of King Gojong’s reign in the Joseon Dynasty. According to historical records, its minting began on the 12th day of the 12th lunar month in AD 1866 and officially ceased on the 16th day of the 6th lunar month the following year. It is one of the few issues with a clearly documented period of circulation.
Sangpyeong Tongbo was a form of currency circulated during the Joseon Dynasty, with its minting period spanning from AD 1633 to AD 1894. Even after Korea was annexed by Japan in the early 20th century, Sangpyeong Tongbo continued to be used by commoners in everyday transactions, particularly in more remote regions during the initial years of Japanese colonial rule.
The coin adopts the square-holed design characteristic of Chinese influence. On the obverse side, the four Chinese characters Sangpyeong Tongbo (常平通寶) are inscribed in regular script, arranged in the order of top, bottom, right, and left. The term Sangpyeong does not correspond to any regnal era of a Joseon monarch; rather, it derives from the Sangpyeongcheong, a government office responsible for providing relief to the poor.
The reverse side of the coin shows significant wear, yet the inscriptions remain legible. Arranged in the order of top, bottom, right, and left, the characters read Ho Dae Dang Baek (戶大當百), indicating that the coin was minted under the authority of the Ministry of Taxation (Ho-bu) and carried a face value of 100 mun.
Facing a fiscal crisis brought on by his father Heungseon Daewongun’s costly reconstruction of Gyeongbokgung Palace, King Gojong authorised the minting of a high-denomination Sangpyeong Tongbo coin valued at 100 mun in AD 1866 as a means of alleviating financial strain. However, the issuance of this large-denomination currency led to widespread illegal private minting, and its practicality was limited, as such high-value coins were seldom used in the daily transactions of commoners. This contributed to significant economic disruption. As a result, production of the 100-mun Sangpyeong Tongbo ceased after approximately 1.78 million coins were minted. The broader Sangpyeong Tongbo series was ultimately discontinued in AD 1894 amid sweeping Westernisation reforms in Joseon Korea.