A horse still works the unpaved 6th Street of Matamoros while early-model automobiles crowd the curb — this rare real-photo postcard (RPPC) captures a border city mid-transition, circa late 1920s–early 1930s, when Corona's "La Cerveza Regia" was already staking signage on the colonial arcade. The handwritten annotation on the image face reads Calle 6ª, Matamoros, Tamps. Mex. / 6th Street, grounding the viewer precisely. The dominant left-side building — two stories of arched windows with shutters — anchors a streetscape that stretches deep into the frame, anchored further back by a building whose pediment proudly bears the date 1919. Shot from an elevated vantage point, likely a balcony, the photographer caught pedestrians, a horse, and period vehicles in an unguarded documentary moment. The blank Kodak-stock Tarjeta Postal reverse confirms production on photographic paper rather than lithograph, classifying this firmly as an RPPC. Never mailed; no postmark or message.