ObverseImage: Wikimedia Commons · A local government during the Five Dynasties and Ten Kingdoms period of Chinese history. · Public domain
Kai Yuan Tong Bao
China
621–907
Reference data compiled from public catalogs
Estimated Melt Value
$0.05
Based on Copper spot price ($6.07/oz) · 95.0% purity · 3.73g
Updated 10:08 PM
Collector premium not included
Specifications
| Country | China |
| Years Minted | 621–907 |
| Composition | Bronze |
| Weight | 3.73 g |
| Diameter | 24 mm |
| Shape | Round with square hole |
| Edge | Plain |
Design
Obverse
Features the four Chinese characters 'Kai Yuan Tong Bao' arranged around a central square hole.
Reverse
Typically blank, though some varieties have mint marks.
History & Notable Facts
The Kai Yuan Tong Bao was the first cash coin to introduce a four-character inscription that set the standard for Chinese currency, remaining in use for nearly three centuries despite political upheavals.
Cast in bronze from 621 during the Tang Dynasty, it featured the text meaning "inaugural currency," with subtle variations in calligraphy and mint marks that hint at regional production differences.
Exact mintage numbers are lost to history, as Tang records weren't always meticulous.
Some versions show wear from constant circulation, a silent record of everyday transactions across Asia.
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