O.Thetford, P.Gray German Aircraft of the First World War (Putnam)

Germania B 1915
  Orthodox wood and fabric aircraft with ply-skinned fuselage. Several aircraft were built and used by the firm's flying school. Engine, 120 h.p. Argus As II.

Germania Type C
  This aircraft, designated Type K.D.D. (Kampf Doppeldecker) by the manufacturers, was little more than a B I fitted with the more powerful 150 h.p. Benz Bz III engine and an elevated gun-ring in the rear cockpit to carry a Parabellum machine-gun. Only one built.