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| 正面描述 | 登录 以查看详情 |
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| 正面文字 | 登录 以查看详情 |
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| 背面描述 | The reverse of this pewter trial piece is entirely uniface, presenting a completely blank, flat field with no design, legend, or device of any kind. The surface shows tool marks and handling consistent with an experimental planchet struck solely to test the obverse die. The reeded collar edge is present, confirming the use of the standard milling apparatus during the trial striking process. |
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| 边缘 | Reeded |
| 铸币厂 | 登录 以查看详情 |
| 铸造量 | 登录 以查看详情 |
| 附加信息 |
Trial pieces from the Mexico City Mint are extraordinarily rare survivals of the internal approval process used before full gold production commenced. For the milled coinage introduced under Charles III, pewter trials allowed assayers and mint officials to evaluate die alignment, collar fit, and edge lettering without committing to gold planchets. Most were destroyed after use or never left the mint at all.
The 1770 date places this squarely in the mature run of the bust-type coinage that had replaced the cob series — a reform Charles III pushed through the colonial mints beginning in the 1730s, with Mexico City not fully converting until 1732.