细节
Air Mail cover 1928 (4 Jan.) envelope front (98x220mm.) carried by Bert Hinkler over the complete route of his record England-Australia flight, bearing G.B. ½d. and 1d. cancelled with Hampstead c.d.s. and sent to Hinkler a few days before his departure; the front with crude sketch of the route and signed by the pilot; also Melbourne invitation card and dinner menu connected with the flight