50 Pesos El Banco Nacional de Mexico

The Banco Nacional de México was itself a product of political engineering — formed in 1884 through the merger of the Banco Nacional Mexicano and the Banco Mercantil Mexicano under pressure from the Díaz government, which wanted a single privileged institution to manage state finances. That merger gave the bank preferential concessions no other Mexican issuer could match, including the right to issue notes redeemable nationwide.

ABNC printed this series across nearly three decades without fundamental redesign — a long run that produced multiple date and signature combinations now tracked as distinct varieties. Collectors should attend carefully to signatory pairings, as some are considerably scarcer than the base type suggests.