Hi Jay,
No mystery at all!
The Albatros D.III is Ltn.Carl (Karl) Allmenröder's D.629/17 of Jasta 11. That "Karlchen" Allmenröder on the right, with Ltn.
Hans-Helmuth von Boddien on the left. The fuselage was overpainted deep red (including the national insignia) while the nose and elevator were white to identify Allmenröder's aircraft from other red-painted Jasta 11 Albatrosse.
Note the wear on the red paint just beneath the cockpit; Jasta 11 pilots generally used ladders to climb into their D.III's, and this shows where either the ladder or their boots repeatedly scraped the fuselage side.
Where did you find the nice scan??