Photograph (reproduction) of a Gourdou-Leseurre aircraft, circa 1910s-1930s.
Typed caption: "Jagdeinsitzer Gourdou-Lesseure (420 PS 'Jupiter' motor), mit dem die Mehrzahl der französischen Jagdfliegen formationen ausgerüstet ist."
Photograph of a German observation balloon, circa 1914-1918. Several servicemen hold the balloon's tethers. A balloon winch is visible on the left side of the scene.