| Comments | First Class postal cards 1C. Airmail service based upon region or zone, rate was 8C per ounce. Special overnight airmail between NY and Chicago 10C per ounce. Other airmail with routes not more than 1000 miles 10C per ounce, airmail with routes between 1000 and 1500 miles 15C per ounce, routes more than 1500 miles 20c per ounce. Airmail between Seattle and LA 10C per ounce. Additional service on any route 5C per ounce. |