The Guanajuato mint
The assayers on its decimal coinage were:
| Initial | Name | Began on | Left office on |
| S | 1869 | 1884 | |
| M | 1876 | 1878 | |
| R | 1877 | ||
| B | 1883 | 1884 | |
| R | 1884 | 1890 | |
| RS | 1898 | 1900 | |
| R | 1900 |
The assayers on its decimal coinage were:
| Initial | Name | Began on | Left office on |
| S | 1869 | 1884 | |
| M | 1876 | 1878 | |
| R | 1877 | ||
| B | 1883 | 1884 | |
| R | 1884 | 1890 | |
| RS | 1898 | 1900 | |
| R | 1900 |