1949 (19 July) Australia Airmail cover from Adelaide to Munich (Germany) (Image)

1940 (29 Oct) Argentina Registered Censored Airmail cover from Los Cocos to Frankfurt (Germany) (Image)

1928 (21 May) Austria Airmail cover from Innsbruck to Konstanz (Germany) 1st flight, with airmail handstamp (Image)

1928 (1 Jun) Austria Airmail cover from Vienna to Berlin (Germany), with airmail handstamp (Image)

1929 (3 Jun) Austria Airmail illustrated postcard from Klagenfurt to Munich (Germany) 1st flight, with airmail handstamp (Image)

1928 (15 Apr) Belgium, Airmail cover from Costende to Cologne (Germany) with red airmail handstamp (Image)

1930 (1 Jul) Belgium Airmail cover from Ostende to Berlin (Germany), with airmail handstamp (Image)

1932 (16 May) Belgium, Airmail cover from Brussels to Essen (Germany) with red Essen airmail handstamp (Image)

1933 (2 Jun) Belgium, Airmail postcard from Brussels to Cologne (Germany) with red Cologne airmail handstamp (Image)

1937 (4 Oct) Belgium Airmail cover from Brussels to Munich (Germany), 1st flight Brussels - Munich (Image)

1937 (4 Oct) Belgium, Airmail postcard from Brussels to Munich (Germany) flight London - Munich with Pilot Signature (Image)

1933 (27 Mar) Cuba Registered Airmail cover from Santiago to Munich (Germany) via New York (Image)

1933 (28 Jul) France Express Airmail cover to Duisburg (Germany) via Essen, with airmail handstamp (Image)

1937 (27 May) Egypt, Airmail cover from Cairo to Munich (Germany) (Image)

1932 (28 Aug) South West Africa Airmail cover from Swakopmund to Luneburg (Germany) franked with two pairs of Mi #164165 CV $150, with Berlin airmail handstamp (Image)

1934 (30 Jun) South West Africa Registered Airmail cover from Windhoek to Munich (Germany) franked with two pairs of Mi #164+165, 166+167 CV $190, with Berlin and Munich airmail handstamp (Image)

1923 (15 Nov) Colombia Airmail cover from Manizales to Bremen (Germany) addition franked stamp of 'SCADTA' first airline in Latin America and violet handstamp on the back (Image)

1924 (16 Jan) Colombia Airmail cover from Manizales to Bremen (Germany) addition franked stamp of 'SCADTA' first airline in Latin America (Image)

1931 (22 Mar) Colombia, Airmail cover from Buenaventura to Ilfeld (Germany) (Image)

Aero Club of Augsburg postcard with Balloon illustration on reverse, sent to Melbourne with Arms 20pf tied 'BAEUMENHEIM/19/OCT/10' cds, a couple of corner creases. Lengthy message in English reads "Our first ascension in a ballon with Hylda was Frankfurt from 10am to 5pm. We landed on top of a tree. Then went up again to land balloon very smoothly in a field." The only recorded example to Australia, and surely the earliest aerial 'incident' en route to Australia. Was sold for A$1,700 in 2019. (Image)

1920 (29 Jul) 'Gliding days', Germany Airmail Postcard from Karpacz (Krummhubel) to Vienna with local overpints on airmail stamps (Image)

1952 (27 May) Saar, Germany, Cover from Neukirchen to Easton, Pennsylvania (United States) (Mi. 298, CV $1,300, Rare) (Image)

1912 (12 Jun) German Empire, First German Airmail on the Rhine and Main, Postcard from Frankfurt (Main) to Torre Pellice (Italy) (Mi. II, Special Cancellations, CV $130, Rare) (Image)

1912 (16 Jun) German Empire, First German Airmail on the Rhine and Main, Postcard from Darmstadt to Heppenheim (Mi. I, Special Cancellations, CV $60, Rare) (Image)

1912 (23 Jun) German Empire, First German Airmail on the Rhine and Main, Postcard from Darmstadt (Mi. III, Special Cancellations, CV $1,560, Rare) (Image)