Watch List notes:

M4621s – 1000 Pesos Banco de México, (1931-1936) Espécimen. UNC. 181 x 84 mm. Impreso por American Bank Note Company, Folios en ceros, sin serie, Tamaño "ancho"

ENGLISH:
181 x 84 mm. Printed by American Bank Note Company, zeros as serial number, No Serial, "Wide" Size.