[robespierre]

I wouldn't advise further disassembly of the CRT. The yoke is adjusted to give the proper alignment and rotation and shouldn't need to be tweaked. To get as much dust out as possible, you could use canned air in concert with a vacuum cleaner. (A bare CRT together with its yoke is not at all sensitive to Electrostatic Discharge, but shouldn't be touched with strong magnets. The printed circuits with semiconductor components are the opposite, as they can be damaged by ESD.)

In the penultimate image you can see the degauss coil. This set is unusual in that there are 6 coils! You can also see the braided steel ground straps that hug the back of the tube's bell. They make contact with the aquadag on the outside, forming one half of the internal EHT capacitor. The other half is the dag painted on the inside, that connects to the anode cap via the button on top of the bell.

One thing that's interesting is that many displays had separate models for the North and South hemispheres because the Earth's magnetic field differs in its vertical component. The field's horizontal component is nulled by the built-in degauss coil.