Indochina Flight Covers 1929 - 1930,  3 Registered Airmail covers w. transit and arrival postmarks :
1) 1929 return flight by Tixier and Robbe was delayed until 24 May because the seaplane’s pontoon needed repairs. The mail from Hanoi to Saigon consisted of 156 letters.  POSTAL MARKINGSHANOI R.P. TONKIN 22-5 29 ; airmail label. Reverse: SAIGON-CENTRAL COCHINCHINE 24-5 29   Signed on back by pilot.
2) Lalouette and Goulette ;  Saigon - Bangkok - Amsterdam - Europe17-25 October 1930 KLM Air Oriental 's  first service  posted at Saigon on 17 Octoberand reached Paris on 25 October 1930. Posmarked SAIGON-CENTRAL COCHINCHINE 17-10 30registry and airmail labels on
3) Pilot Lalouette and navigator Goulette  19 November to Hanoi. Letters were numbered, backstamped Hanoi 14:45, 21 November upon arrival. : Posmarked: SAIGON-CENTRAL COCHINCHINE 19-11 30airmail and registration label  Reverse: receipt label and HA-NOI R.P. TONKIN 21-11 30