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1 Cash - Qianlong Tongbao, Boo-chiowan, palace coin
| Issuer | Board of Revenue Mint (戶部局), Beijing |
|---|---|
| Year | 1752-1800 |
| 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 |
| Shape | Log in to see details |
| 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 (traditional, regular script) |
| Obverse lettering | Log in to see details |
| Reverse description | Log in to see details |
| Reverse script | Mongolian / Manchu |
| Reverse lettering | Log in to see details |
| Edge | Log in to see details |
| Mint | Log in to see details |
| Mintage | Log in to see details |
| Additional information |
The Board of Revenue Mint in Beijing operated two furnace halls — Boo-chiowan (源局) and Boo-yuwan (裕局) — producing cash coins under tightly regulated quotas throughout the Qianlong reign. "Palace coins" from this mint were held to a noticeably higher standard of alloy and finish than provincial issues, reflecting the court's insistence that Beijing-struck cash maintain a fixed brass ratio at a time when distant provincial mints were routinely debasing their output with higher zinc or lead content. The Yunnan copper supply disruptions of the mid-18th century made that discipline increasingly difficult to maintain.