1 Peso Reverse Trial, Copper

Trial pieces for the 1 Peso denomination in this period were produced at the Mexico City Mint as part of the technical evaluation process ahead of confirmed production runs. This particular bronze striking represents a reverse trial — meaning the obverse die was likely a blank or plain field, used solely to test the reverse die's impression depth, flow characteristics, and relief under working pressure. Such pieces were not intended for circulation and rarely left official custody.

The Porfiriato had just ended. Díaz fled to Europe in May 1911, and the mint was operating under acute political uncertainty when this trial was made.