The FF.67 was an experimental monoplane floatplane powered by one Mercedes D.IV. Its first flight took place in December 1918, a month after the Armistice.
Specifications
Data from Friedrichshafen Aircraft of WWI: A Centennial Perspective on Great War Airplanes[1]
Borzutzki, Siegfried (1993). Flugzeugbau Friedrichshafen GmbH: Diplom-Ingenieur Theodor Kober [Friedrichshafen Aircraft Company: Diploma-Engineer Theodore Kober] (in German). Berlin: Burbach. ISBN3-927513-60-1.
Herris, Jack (2016). Friedrichshafen Aircraft of WWI: A Centennial Perspective on Great War Airplanes. Great War Aviation Centennial Series. Vol. 21. n.p.: Aeronaut Books. ISBN978-1-935881-35-3.