Hi Ricardo Miranda,
You are right on the point I asserted incorrectly. I said Needle is up when meter off. That's False
With no battery, my needle is centered.
I can simulate a Takumar or Super Takumar lens by unscrewing the SMCT lens one turn. Now I believe the linkage is designed to shoot the needle to top when "Depth of Field switch is Down" as a feature to keep user from thinking exposure is correct. When I cover the lens completely the needle returns to center as the meter "powers off" and I can watch it shoot to top when I let in a small amount of light.