1910 Aviation Week (5-12 June) at Mondorf, colour ppc for the event picturing airplane and noted as one of the first trials, with 5c Arms tied by rectangular boxed Mondorf les Bains / Champ d’Aviation (airfield) ds, sent to Walferdange (bs next day), a rare early Luxembourg airmail item, very fine (Mü. 2, 20’000pts) (Image)

1932 (May) Zeppelin 4th South America Flight MIXED FRANKING pc with 1.25Fr Luxembourg franking (foreign ordinary mail rate) tied 28 April plus German 1.40RM (incl. 1RM Zeppelin) tied at F’hafen on 2 May, printed Behrens cachet plus flight cachet, Rio bs (5 MAI), the franking was necessary because Luxembourg was not a signatory to the convention which included the posts and the Zeppelin Co., very fine and scarce (Sieger 157) (Image)

1933 (May) Zeppelin 1st South America Flight, pc with MIXED FRANKING, Luxembourg 1Fr airmail tied May 2, flown to Berlin where 75pf in Eagles were tied (May 6), connecting flight cachet and s/l Barcelona drop cachet with bs there of 7 May, uncommon, very fine (Sieger 202 Bb variety) (Image)

1936 (May) Zeppelin Hindenburg 1st North America Flight, large MIXED FRANKING cover with 1,75Fr (two airmails) tied at Dudelange, with Germany 50pf pair tied at Frankfurt, flight cachet with code d, bs incl. Luxembourg Ville (May 2), New York (May 9) and Dudelange return bs (May 16), the German franking paid the airmail rate to USA and back, fine and uncommon (Sieger 406, € 250) (Image)

1936 Card franked Luxembourg FIP Congress 1,25F + German Reich airs 50Pf for Airship Hindenburg 9th North America flight bearing Frankfurt 26.9.36 and Luxembourg 24.9.36 cds, also purple airmail cachet and Sept 29th New York arrival marking, scarce (Image)