Congratulations on finding the grail of WWI sniper rifles, and the only complete original set in existence AFWK, and thanks for posting those excellent photos.
Is there a small inspection stamp on the inside of the female dovetail (on the scope)?
I hope you will try to research the history of this set and share that with us if possible? It must have had an interesting life as it does not look like it saw service in WWII for training as most of them did reportedly.
Have you removed the action from the stock and the butt plate to see if there is any identifying information anywhere?
Oh, and any notches cut in?