Centered national shield in relief, encircled by "ESTADOS UNIDOS MEXICANOS." Around the frame, historical Mexican shields and the eagle from the Codex Mendoza's first page.
A prairie dog image with "$5" to its right and "2001" to its left. At bottom: Mexican Mint symbol. Upper left: "PERRITO DE LAS PADERAS" and *Cynomys ludovicianus*. Lower left: "ENDANGERED ANIMALS".