fltmech:
The first Alb. D.II to be fitted with the wing airfoil radiator was one of the two Alb. D.II prototypes, Alb.D.II 386/16 had a Teves und Braun radiator, this machine was issued to Hptm.
Oswald Boelcke, Jastaführer of Jasta 2.
The production Alb.D.II commencing with serial number D.472/16 through D.521/16 employed the Windhoff side or ear radiators mounted on the sides of the fuselage, on the center-line.
The Alb.D.II built by OAW had the wing mounted Teves und Braun radiator, serial numbers D.890 - 939/16.
All the LVG built Alb. D.II(LVG) 1024 - 1098/16 had fuselage mounted ear Windhoff radiators.
The last production batch were Albatros built Alb. D.II 1700 - 1798/16 had wing the mounted Teves und Braun airfoil radiator.
Blue skies,
Dan-San