The San Luis Potosí mint

The San Luis Potosí mint opened late in 1827 and began striking 8 Reales. With the exception of two interruptions Cap and Rays 8 Reales were struck at this mint from its opening until its closing on 1 May 1893. The first occurred during the Maximilian era, when the mint was occupied by Imperial forces from 25 December 1863 until 25 December 1866. Apparently, the mint continued operations issuing Republican coi ns for a brief time after the occupation. Four and eight reales are known dated 1864 and both are very rare. In 1864 this mint issued Imperial type five and ten centavos and in 1866 Pesos with the portrait of Maximilian. It is also possible that the Imperial Government struck coins in the Potosí mint with dies datcd 1863. The second interruption took place when 8 Reales coinage was suspended from 1870-1873 in favor of the Balance Scale Peso.

Mint owners or lessees and their tenures

Assayers and their tenures (as evidence by coinage)