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1 Cash - Khai Kiến Thông Bảo
| Issuer | Cao Bằng Province |
|---|---|
| Year | 1593-1625 |
| Type | Log in to see details |
| Value | Log in to see details |
| Currency | Log in to see details |
| Composition | Log in to see details |
| Weight | Log in to see details |
| Diameter | Log in to see details |
| Thickness | Log in to see details |
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| Technique | Log in to see details |
| Orientation | Medal alignment ↑↑ |
| Engraver(s) | Log in to see details |
| In circulation to | Log in to see details |
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| Obverse description | Log in to see details |
|---|---|
| Obverse script | Chinese |
| Obverse lettering | Log in to see details |
| Reverse description | Log in to see details |
| Reverse script | Log in to see details |
| Reverse lettering | Log in to see details |
| Edge | Plain |
| Mint | Log in to see details |
| Mintage | Log in to see details |
| Additional information |
Khai Kiến Thông Bảo cash coins were struck under the authority of the Mạc lords who retreated to Cao Bằng after the Lê-Trịnh forces retook Thăng Long in 1592, effectively confining the remnant Mạc administration to the mountainous northeastern frontier. The provincial attribution to Cao Bằng reflects that political reality — these are not imperial issues in any meaningful sense, but the output of a dynasty in exile clinging to legitimacy through the familiar vocabulary of coin production. The series ran until the Mạc were finally extinguished in 1625.