Evening FH!
...I feel the same as you before this one here!
Problem with Curtisses is that the vertical stab is usually much shorter than this...
My initial thoughts were in the direction of the "bad guys" in WWI (Germany, Austria-Hungary), but my research came to nothing in the end...
It is a beautiful looking bird, but we've had recently a beautiful looking American biplane, so I can't rule that out...
Edit: we've had a Ducrot in the past with an underslung wing and it was on a rigging stand too...
similarities end here
