If anybody has a blackface or silverface Fender amp hangin around, would you mind measuring center to center on the vol, treble, bass knobs etc?

I'm trying to create a chassis for a Pro Reverb build and I don't know the hole spacing for the pots.

Much appreciated, Thanks!

I have a 1963 blackface bandmaster - (one of the first blackfaces) - and knobs measure 35mm centre to centre - regards Steve.

Rebel is correct. My SF Pro Reverb measure 1-3/8" center to center. 1.375 inch = 34.925 millimeter.

Many thanks!!