I am fascinated by the style of German poster art from this period (and on). The images are typically stylised, simple and eyecatching. Here some I have found online:
'Ernst Udet' brand cigarettes were manufactured by Zigarettenfabrik Lessing & Co. in Frankfurt am Main for a number of years.
After the Armistice Ernst Udet and Ritter von Greim performed mock dogfights on weekends for the POW Relief Organization, using surplus aircraft in Bavaria [from Wikipedia]. Looks like a Fokker DVIII
Poster was designed by Ernst Höber in 1927
Poster is circa 1922