I have a German magazine rifle made in 1925 im looking to put a fixed four power scope on, and I’d like(I think?) to put something from the pre-ww2 era on it. I don’t know vintage scopes, what recommendations are there? Will I be disappointed in glass quality?

Aaron, not sure if this will help but here's my experience from about 25 years ago.
I had a back action hammer drilling with claw bases and looked for period scopes, Hensold, Pecar, Zeiss, etc.. I finally found a very old Hensold and had a company in Texas (may have been the remnants of Weaver or Lyman) clean it up and seal it as best they could. I recall they may have used some bee's wax.

It looked great and worked, but wasn't near clear enough IMHO. The gentleman who bought the drilling was using it for short range "in the woods" hunts and was delighted with it.

That was my one, single, experience and hope others chime in

Zeiss/Hensoldt were the best pre-WWII but waterproofing and lens coatings were in their infancy. I respect greatly the reticle-movement models just before they all changed to image-movement after 1975. Nickel and Kahles changed later, of course, and Pecar kept the faith until they closed in 2006.

Some of the old-timers were happy to put small scopes on big rifles. One of Townsend Whelen's favorite was the little 2.25x Zeiss Zielklein, with a 22mm straight-tube. He was happy to put it on his 270 Win and saw it as good enough for big game out to 350 yards. The one I have is a beauty, with the finest field blending and one of the longest eye boxes I can think of. It has no horizontal screw lock but since the wheel moves easily I suspect you must have to tighten down the screw(s) on top. I think the reticle probably runs in a dovetail as the double-turret version had the knobs offset, suggesting an Oldham coupling - a system likely to withstand recoil better than anything made today.

Some post-war German makers like Nickel and Pecar continued with the screw lock for a while but waterproof caps had been used in the 1930s by Noske, at least. His best was the Type A, which also had offset turrets and were claimed to be self-locking.

By 1944 the Lyman Alaskan also had modern-looking waterproof caps but those made in 1937 did not.

So, what could you use that might look a bit 1925 without the weather risks? I would look for a small Kahles Helia 2 S2 2.5x or perhaps the 4x32 model up until about 1980, because the objective-housing angle was more abrupt than is often seen since. The reticle-movement Unertl Hawk 4x, made up to about 1985, also has those squarer angles and old-looking knobs.