Just a note here. I had a lot of discussion with Rowan, Greg Van Wyngarden, and others when I was doing this scheme. WNW posted photos that were unavailable when Rowan did this sheet, and Greg did his book. The general thoughts that resulted were thus:
1. The original thought by GvW was that the Albatros Fighters would have been delivered in batches and since the aircraft to the left of Polka Dots had Lozenge on the uppers it made sense that Polka Dots would also.
2. WNW photos showed undersurfaces that showed what clearly looks like standard light blue undersurfaces.
3. Another DV in the Line up has clearly Lilac and green on the uppers eliminating the small batch thus the same covering theory.
4. No photo clearly shows Lozenge on the upper or lowers of Polka Dots.
The conclusion was that one could do any of the following :
1. Lozenge on both wing surfaces as depicted.
2. Lozenge on top and blue on the bottom.
3. Green and lilac uppers, blue unders. ( My Choice as well as Richard at WNW) Now we can discuss the tail color
So don't get too hung up on orientation.
RAGIII
PS: this link should get you to photos of my build and a link to where the original conversations took place.
http://forum.ww1aircraftmodels.com/index.php?topic=640.15PPS: IIRC Rowan felt that there was Lozenge AT LEAST on the uppers if not all surfaces after the discussions