Real photo postcard (RPPC) of the Palacio Municipal (city hall) and Plaza Principal of Matamoros, Tamaulipas, Mexico. The view shows the arcaded two-story Palacio Municipal at right, a broad cobblestone plaza shaded by large trees with park benches and seated figures, and a row of period automobiles parked along the street. A sign for "Eléctrica Matamoros, S.A." is visible at far left. A white arrow pointing upward is chalked or painted on the cobblestones, with the number "76" nearby — likely a photographer's reference mark.

• Caption: "PALACIO Y PLAZA PCPAL. / MATAMOROS TAMPS. MEX."
• Status: Unposted