For your Blackface Fender 1964 Amp through 1967, here is an original knob.
Notice this has the set screw on the side that sets at #10. Also the #8 on these original knobs looks like a snowman.
The other feature is they have the metal insert on bottom of knob.
It shows dirt and wear from being 50 years old. Great to restore your Blackface Deluxe Reverb, Princeton, Twin, Champ and other Fender Amps.
Model:Black Face Amp Knob - Princeton, Deluxe Reverb, Super, Twin
Year:1964 - 1967
Made In:United States