China / Indo-China 1938 Airmail envelope to Hong Kong

cover bearing Yvert 111, 12c Brown, Yvert 200, 6c Brown and Air Mail Yvert 6, 20c Olive tied by Hanoi Tonkin datestamp with "Hanoi-Hong Kong Ouverture du Trafic Postal Aerien Regulier Par Air France" cachet in Blue with Kowloon receiver. (pt)

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