Letter on reverse (below) kindly translated by xiphophilos: authored in Chimay on 3rd July 1917 and addressed to a Herrn Anton Meichle in Hagenau. Briefstempel: SB ... Melzlen[?]
Zensurstempel: Überwachungsstelle Konstanz, XIV. Armee-Korps.
A postcard depicting Flieger Schremser and his dummy "Flieger ?". These cards were distributed to members of Herrn Schremser's audience, probably as a memento of his show and some shameless self-promotion.
The letter on reverse was authored in a military hospital which tells us he was busy entertaining the wounded in the rear echelon.