MEXICO. Lot of (2). El Banco de San Luis Potosi. 500 Pesos, ND (1897-1913). P-S404p1 & S404p2. Front & Back Proofs. PMG Gem Uncirculated 66 EPQ.
Printed by ABNC. An elusive pairing of front and back proofs for this 500 Pesos design, both of which are in Gem 66Q grades.
Estimate: $1000 - $1500