I was able to unstuck the focus, its kinda loose but should be enough for a Testroll
Ah, that's not so good... It is pretty typical, though, for Agfa cameras - what's happened is the whole of the front group has come loose from its mounting threads. The confirmation of this is that the focusing ring moves in and out a very small amount as it is focused from close-as-it-can-get to infinity. If the helical is working correctly the focusing ring should move by a good 3mm.
If the lens is rotating on the mounting threads then make a score mark between the focusing ring - the part that says 'Apotar' - and the front of the lens cell. Then undo the three small screws that hold the focusing ring in place. You should then be able to slip off the focusing ring and then unscrew the front group.
Make another score mark between the two parts of the front group, take a photo also - the front helical has multiple threads and you need to get it back together using the same threads.
Now begins the wonderful experience of getting the helical unstuck. If you are lucky then it might come loose under persuasion, try running it under hot tap water to help soften the goo. If unlucky then prepare for an ordeal of long soaks in solvent, try 'lacquer thinner' to start - it's denatured alcohol and other stuff.
After you have gotten it apart, and the helicoid cleaned out, lubricate the helicoid threads with Dow High Vacuum Grease
https://www.amazon.com/Corning-High...ords=high+vacuum+grease&qid=1620524618&sr=8-3
or #10 helicoid grease, also available from Amazon.
Screw the helicoid back together - it will probably take several tries until you can find the right threads so the score marks and the picture match. Screw the front group in the shutter/aperture assembly, screw it in tight. Then mount the focusing ring on the front group, line up the front score marks and tighten the three small screws.
You can check the focus by stretching some scotch tape across the film rails and looking at the image with a loupe.