Australia
First Airmail Flight of British Commonwealth Pacific Airlines Ltd.

Aerogramme (Roggenkämper et al. no. 2) carried on the first airmail flight of British Commonwealth Pacific Airlines Ltd., Trans-Pacific Air Service Australia-Canada from Sydney airport at Mascot on September 15, 1946 to Vancouver (arrival cds September 18, 1946 on back panel). 

It is reported, that only 100 covers were flown. Special cachet in purple and specific dark-blue imprints on the aerogramme.

from: Chronicle (Adelaide, Sep 19, 1946)


































References
Roggenkämper et al. stands for Roggenkämper, Russ, and Wiegand, Katalog der Aerogramme von Australien und Ozenaien, 2003