S!
I appreciate the discussion!
I respectfully and without malice disagree this is a
Jasta 5 Albatros.
1. #78 on page 19 Volume 2. Same photo as I've posted above. What appears to be "piping" is far too skinny to be standard
Jasta 5 red piping and is just the outline/shadowing of the vertical stabilizer frame. Plus, regarding the rudder, look at this photo I've lightened in Photoshop. There is zero piping at all on the rudder:
It's just an effect one sometimes sees on Albatros vert stabs. For instance, look on
Jasta 11 Schaefer's D.III 2062/16:
Based on photographs and descriptions, this machine without question had no piping along its rudder or vert stab, it was just black, yet there appears to be "piping" on the vert stab, just like the machine in the Boistrancourt shots.
2. Beyond being overpainted D.V rudders--which look alike on countless
Staffeln machines--the background D.V rudder (MvR saluting shot) is clearly and unmistakeably lighter than the MvR machine. The piping is also ostentatiously visible while on the plane in the foreground there is no piping visible at all on the darker rudder. Additional shadowing from an offset rudder wouldn't eliminate piping, it'd just make it darker.
3. Regard the circumstances behind the photo, which research indicates was taken when MvR was searching for word of Lothar's downing 13 March 1918. My next comment is proof of nothing, but even though there is no discernible piping on the rudder or vertical stabilizer, if this is a
Jasta 5 plane then MvR must have driven over and taken it from them. Why, when he has four
Staffeln under his command in JG1 and could take any plane he wanted from those
Staffeln? (And this plane is screaming out that it belongs to or is ex-
Jasta 4.) Bodenschatz wrote MvR always did just that, grabbing the nearest machine on hand and flying off to conduct whatever business he had to conduct. If he flew/was flown over to Boistrancourt in a two-seater (say, the JG1 hack Albatros C.IX) and then took a
Jasta 5 plane, why? He would have already be flying around; why take another
Jasta's plane? I concede there could be mitigating circumstances we'll never know or haven't uncovered yet, but as it stands the above makes no sense.
I agree that precise determination of color values is mostly a waste of time with WW1 photography. As you wrote, "the nature of the photograhpy being such that shadows, shine, reflection, etc. all conspire at times against a truthful or complete replication of reality." I believe this is why you are perceiving red piping on the rudder when there is none.
I hope I don't get thrown out of the Staffel before my first flight because of this!

And if you disagree with the above, well, that's part of the fun of WW1 research, trying to figure out all of this with just "photo archeology." BTW, if I ever find irrefutable evidence this Albatros
was a
Jasta 5 machine, I'll shout that from the rooftops right after I proclaim that I was wrong.