b'60410410C 7 June 1924 (AAMC.72) Sydney - Adelaide registered flown cover carried on the inaugural service by Australian Aerial Services, with Adelaide arrival cds. $300350411411C 30 June 1926 England - Australia - England (AAMC.96) cover signed by pilot Alan J Cobham and endorsed by him Carried on board the DH50 Seaplane/on its outward journey to Australia & back/July August Sept 1926 with Great Britain KGV 1d tied SYDNEY 16AU26 datestamp on arrival, fine condition, Cat. $5000.Cobham arrived in Sydney via Darwin on 15 August; on the return trip he left Melbourne on 29 August and arrived London on 1 October. Fewer than five covers were flown on the entire round trip, the return leg being the first airmail carried from Australia to England.Provenance: Tom Frommer. $3,0004,000'