04-05-2022, 08:05 PM
Not a bias cell holder but it is a ceramic trimmer capacitor. Usually those type are small value of just a few mmfd up to about 45mmfd.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry