Not a postcard in the tourist sense, but a beautifully printed mid-century Mexican trade card and folding currency-exchange booklet from Talabartería "La Nueva," S.A. — a leather goods wholesaler at 5 de Mayo 16-A in Mexico City's historic commercial center — this bilingual advertising piece is a crisp artifact of mid-20th-century Mexico City retail culture, printed in the Mexican national colors of red and green and pitching everything from crocodile-skin handbags to airplane luggage to American tourists and businesspeople crossing the border. The reverse of the outer card features a dollar-to-peso conversion table at the fixed rate of 12.50 pesos per U.S. dollar, a rate that pins this piece firmly to the era of Mexico's "stabilizing development" (Desarrollo Estabilizador) monetary policy, in force from roughly 1954–1976 when the peso was pegged at exactly 12.50 to the dollar — making this a precise economic timestamp. The inner fold opens to a full pesos-to-dollars exchange table with space for a customer's name and address, essentially a pocket reference card given away at the shop counter to visiting American shoppers.