Hong Kong. (Imperial Airways). 1936. Envelope addressed to Australia bearing Hong Kong SG 124, 10c blue, SG 124, 10c blue, 125, 20c sage and purple and SG 126, 25c purple and magenta (2) tied by Hong Kong/ Air Mail double ring with framed 'First Through Flight/ Hong Kong-Penang-London/ via Imperial Airways/ 27th March 1936' on face in violet , endorsed 'First Flight Hong Kong/ Australia' with Brisbane receiver. Very fine.