50 Centavos

This long-running type spans some of Mexico's most turbulent decades — the tail end of post-revolutionary reconstruction, the Cárdenas land reforms, and the economic pressures of World War II. The .720 fine silver alloy adopted for this series was a deliberate step down from the purer compositions of pre-revolutionary coinage, reflecting the fiscal strain left by a decade of civil war that had decimated the country's monetary infrastructure.

Production ran across multiple Mexico City mint issues, and collector attention tends to focus on the low-mintage dates from the early 1920s, when post-revolutionary output was still irregular.