A mirror-still tidal pool at Playa Hornos reflects a stand of impossibly tall coconut palms and a low white colonial building in this hauntingly beautiful real-photo postcard of Acapulco before the jet-set era transformed it — the palm fronds motionless against a sky of sculpted cumulus clouds, a small rowboat barely visible at the water's edge, the mountains rising soft and dark to the left. This is Acapulco as it appeared in the 1940s, when it was just beginning its transition from a quiet Pacific fishing town to Mexico's first international resort destination, years before the famous cliff divers of La Quebrada became global icons. The RPPC format — a genuine silver-gelatin photographic print on postcard stock — gives the image a tonal richness and documentary intimacy that printed cards cannot match. The card number 297 is printed in the lower left of the image; the reverse is a standard Mexican "Tarjeta Postal" format, unused, with a "SELLO" (stamp) placeholder box printed but no stamp affixed.