MEXICO. Banco de Nuevo Leon. 500 Pesos, ND. P-S365s3. Specimen. PMG Choice Uncirculated 64.(M439s) Specimen. Printed by ABNC. A very scarce high denomination found here in beautiful condition, with the printers stamp on the reverse being mentioned on the holder. A rare find and the first we have offered.PMG Choice Uncirculated 64.