100 Pesos Nayarit - Gold and Silver Proof Issue

Part of Banco de México's long-running series honoring the pre-Columbian cultures of each Mexican state, this issue represents Nayarit — a Pacific coast state whose ancient Shaft Tomb culture, active roughly 300 BCE to 400 CE, produced some of the most distinctive ceramic and gold work in Mesoamerica. The bimetallic proof format, introduced for this series in the early 2000s, required the Mexican Mint to develop specialized die and planchet handling to prevent contamination between the two metals during striking.