The Imperial German Eagle and the row of three proof marks look too German not to be German. In the row of three proof marks with the crowns over them, the one on the left looks more like an Amberg proof than an Erfurt proof, but without holding the rifle in hand and inspecting it with my own eyes, I can't tell for sure.
More pictures of the entire rifle, including details of the action in 360-degrees and bolt would certainly help narrow it down a bit
