Guten Tag allerseits! I found follwing information on Oberleutnant
Hans Waldhausen: at first observer, since 1915 pilot, earned EK I. Belongs to FFA 53, 272, FA 9b, 296, Jasta 37. Flow Albatros Alb D V 2284/17, painted with black half-moon and star. Captured 27.09.1917 by the british after balloon attack. Discharged 01.11.1919.
sources: "Jagd in Flanderns Himmel", "Udet - Vom Fliegen besessen", "Ernst Udet - Biografie eines großen Fliegers"