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| 正面描述 | The current Mexican national arms occupy the center of the field, depicting an eagle passant left perched on a cactus devouring a serpent, surrounded by an oak and laurel wreath. Encircling the central arms are ten smaller renditions of historic Mexican national arms as used in previous periods, arranged in a ring around the central device. The curved legend ESTADOS UNIDOS MEXICANOS arcs across the upper portion of the field between the central and surrounding arms. |
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| 正面文字 | 登录 以查看详情 |
| 正面铭文 | 登录 以查看详情 |
| 背面描述 | 登录 以查看详情 |
| 背面文字 | Latin |
| 背面铭文 | 登录 以查看详情 |
| 边缘 | 登录 以查看详情 |
| 铸币厂 | 登录 以查看详情 |
| 铸造量 | 登录 以查看详情 |
| 附加信息 |
The "Mariposa" nickname refers to the butterfly-shaped privy mark used by the Mexican mint during this period as an anti-counterfeiting device — a feature introduced specifically for their bullion and commemorative silver issues in the late 1990s. Casa de Moneda de México, the oldest mint in the Americas operating continuously since 1535, adopted these security marks as international silver bullion markets grew increasingly competitive with Canadian and American program coins.
KM#630 was struck across two calendar years, making date-specific examples worth distinguishing for type collectors.