Page 9 - Chinese International Airmail to 1949

1.1.2 IAL (BOAC from April 1940) Hong Kong to Bangkok, IAL (BOAC) Empire Service

Rate: 1 Nov 1939 to 13 Jun 1940. Surface first 20g $0.50 Air per 5g to South Africa $3.40

30 May 1940 ‑ Shanghai to Johannesburg, South Africa. Carried on one of the last flights prior to WW II.
Censored in Hong Kong. Triple rate letter $0.50 + 3 x $3.40 = $10.70.

Mail from Occupied China: The rate revisions of unoccupied China were ignored by the governments in the northern provinces.

6 Apr 1940 ‑ Peking to London. Paid $0.50 + $0.45 = $0.95; the rate had increased three times in the south since $0.95 was valid.