I took a shoot in the dark an bought a non working 576 from a local classified section (something fell on top of it and cracked the aluminum bezel and sheered of a couple of the knobs on top.
Apparently when you switch it on only the screen illumination works based on what the seller told me.
I‘m not able to pick it up for a couple of weeks but got some pictures.
Interestingly both high voltage covers are metal compared to the ones I worked with so far which were Metal (flyback) and brown ?plastic“.
It also has the little solder holder in place.
Know the big question is what Version the flyback transformer will be brown or black…
Do you have maybe any details what I can expect?
The seller also confirmed that the CRT looks ok…we will see…
Thanks for your help
