China Macao Pan Am cacheted registered First Flight cover cancelled in Shanghai on April 26, 1937. Mailed to Manila and backstamped there on April 29. (Image)

Dairen, China cancelled on May 31, 1938 under Japanese Occupation. Mailed to Berlin Cover has lower right and left side corner folds. (Image)

China cacheted registered First Flight cover cancelled in Shanghai on April 26, 1937. Mailed to Manila and backstamped there on April 29. (Image)

China Hong Kong Pan Am cacheted registered First Flight cover cancelled in Shanghai on April 26, 1937. Mailed to Manila and backstamped there on April 29. (Image)