Well if you just do a simple Internet search for major markings on an object, often enough you find your answer quite easily- I just had a look for OIGEE Berlin and found they were a significant optics maker for a long time, including having produced, with Argus, the very first fighter airplane reflector sight in 1918! A few pages away I found this: Oigee Zielfernrohre It could be a simple hunting rifle telescope- most of these seem to have the identifier marking on the one side of the adjustment knob housing, which you haven't shown- perhaps there your exact question is answered? There are a lot of these about- everyone identifies them as 'sniper scopes', but were there so many, many snipers in the Wehrmacht? I suspect they're really just commercial hunting scopes- some perhaps used for the military, sure, but they're not necessarily military scopes.
Ohhhhh- pillage then burn...
Thank you for showing your scope here datrus, I like it, would be nice to see it on a military rifle. I found one scope that looks like it, but probably is impossible to tell 100%. (This is the best i can do when looking thru my pictures.)
Collect ROA, Cossack, Schuma and other WW2 Volunteer militaria.
"Be Humble and kind, for you may find that it was Odin you entertained"