Centering question - 1955 Bowman

Does anyone know how to properly measure centering on 1955 Bowman? Should the measurement for T/B centering be taken from the bottom of the 'Color TV' box on the bottom, or should that box be more toward the bottom of the card?
Thanks in advance.
Thanks in advance.
0
Comments
The best example(s) I can give you can be found on the set registry.
Set # 20 has 2 cards pictured. One is centered one is OC.
If you go there you will see.
In general the dial at the bottom should have a sliver of brown showing.
Hope that helps.