50 Pesos Guerrero Aguila - 1/2 oz Silver Bullion

The Guerrero Aguila series draws from pre-Columbian Aztec warrior iconography, part of Mexico's broader early-1990s push to establish a nationally distinctive silver bullion program alongside the better-known Libertad coinage. The 1992 date places this issue squarely in the NAFTA negotiation period, when Casa de Moneda was expanding its bullion output to attract both domestic and foreign investment ahead of the treaty's 1994 implementation.

KM#555 is a short-lived type — the Guerrero Aguila denominations were not continued as a sustained annual series, making any single-year issue harder to complete in date runs than the Libertad.