I am struggling to identify the collar tabs. The picture surely does not help much, I am afraid, but hopefully could somebody with a trained eye recognize what kind of unit this officer belonged to.

Could it be artillery? Or maybe some other type of unit?

Any thoughts or remarks regarding further details are more than appreciated. I aquired this picture some time ago and try to learn as much as possible. So far, I just assume the picture could be taken around 1943 or later as the officer seems to already have the Eastern Front medal in his ribbon bar.

Thank you.

Pavel