The exact knob is made by Rogan Corp of Northbrook Illinois. The part number is 155-7. Not a stock item, you'll have to order 1000. The knob with numbers is 155-29 but the font is different than that used in the 60's. They look like the knobs used on MusicMan amps in the 80's. Most people use Fender knobs if they want numbers. Fender knobs are numbered 1-10, Sunn knobs are numbered 0-10.