Thank you Steven, Jim, for the good explanations! Good to see that there are some more EF enthusiasts here.
It is fascinating to see how the meter-needle position is transfered into the correct corresponding aperture-setting. All without electronics, just pure precise mechanics. I spent at least one hour last night just to examine all those levers...
Next thing, I will remove the galvanometer, since the aperture scale in the viewfinder seems to be stuck or disengaged. The more I deal with my "for parts only" EF, the more I am reaching out to get her back to life again 🙂 Fortunately the PO didn´t break anything as far as I can see.
Have a great week.
Arno