Hello all: great notes and comments!
I setup all 4: 2X 2467B, 2465B and 2467.
3X fine, just barely noticeable < dim trace width, and << 1/10 division, or no nonlinearity.
Upon closer examination, the suspect 2465B, with the geometry issue and geom trim full CCW:
a. Deviation is ~ a dim tracewidth thickness, less than 1/10 division. Noticeable at both top and bottom of CRT.
b. Both top and bottom traces are bending slightly upwards at right but seem straight at left.
c. Most noticeable at 0 and 1st vertical bottom and 7, 8 at top.
d. You really have to look carefully to see it.
e, Not affected by intensity, focus, astigmatism.
A tip for HV board adjustments, The PCB is recessed 1" in back of the metal shield. If you do not remove the shield on the HV board, it is difficult to center the tool, especially with a plastic slotted alignment tool. I use a small metal Phillips driver, and a headlight to see thru the holes.
About degaussing, MuMetal shield seems thick and very complete, so accidental magnetization seems unlikely.
Any stray remnant magnetic field would be uniform, and affect only the corners.
Bonne Journée
Jon
PS: Any 246X aficionados have more than 4?
I accumulated since 1992, in V. G. - exc. cond.
Enjoy fixing and calibrating, also have many original manuals.
The digital scopes have many benefits but I still prefer these analog scopes.