MEXICO. El Banco Mercantil de Monterrey. 20 Pesos, ND (1900). P-S354s. Specimen. PMG Superb Gem Uncirculated 67 EPQ.
M426s1. Printed by ABNC. Plata. Middle signature title of "Presidente." One of just three listed on PMG's pop report for the variety. PMG Pop 1/None Finer.
Estimate: $700 - $1000