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