P11 compass info needed

Thank you Edgar. I very much appreciate your help. Maybe now it will go a bit smoother.

John

You don’t need to remove them, since they’re the retaining nuts for the wires; if the compass dates back to the radium paint era, you risk scraping the paint off the wires, as you withdraw them, with all the dangers that entails. If you remove the “ordinary” screws (which you appear to have done already,) and loosen the screws holding the horizontal springs (visible far right in your photos,) so that you can retract the springs, you should be able to remove the grid ring. As far as I remember, the springs have projections, which go through holes in the grid ring, and engage in a slot in the bowl proper.
Before doing that, though, remove the round-head screws, visible in the bottom of your photo, and you can remove three (I think – it’s at least 10 years since I looked at one) curved retainers, which will enable you to lift the whole bowl assembly out of the base. Before removing the grid ring, it’s a good idea to remove the curved “brake lever,” which operates a friction pad, designed to stop the grid ring rotating in flight, due to vibration, since it’s always liable to get in the way.
You’ll possibly have difficulty removing the bowl assembly, since there are some supporting cone-shaped anti-vibration springs, in the base, and there are some projecting “feet,” on the bowl, which have small spigots which slide into the top of the springs. They are often very reluctant to slide out again.

That just might work. It’s worth a try for sure. Thanks.

I just tried it and it worked although 3 of the screws are quite balky and will require more effort and penetrating oil to remove them. Those little “nubs” in the middle are the ends of the 4 crosswires. I don’t know how that will effect removal of the piece (and I hope the crosswires are not coated with radium. That would be a problem.
Thanks again.:)

Take a flathead screwdriver and cut a notch in the center of the blade to fit over the shaft?