A weathered airmail envelope from the personal correspondence archive of the Moon/Sammiet family, postmarked in the late 1940s. The envelope bears a 5-cent U.S. Air Mail transport-plane stamp, a common denomination used for military and civilian correspondence during and after World War II. Addressed from Rockford, Illinois to Richmond, California, the letter reflects the era's reliance on air mail for rapid long-distance communication between families separated by wartime service and postwar relocation. Project: 218341