English: This coin is the formal script version of the *han t'ongbo (Ch. San Kan Zhong Bao), also issued in the Koryo dynasty. The Koryo had unified three separate states on the peninsula in the 10th century by conquering Silla and Paekche on the southern end. The name of this coin means "heavy treasure of the three han (peoples)" in reference to this history. I have not yet tried to clean this coin for fear of damaging it.
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