Fender® Cream barrel knob with set-screw

"Fender Barrel" knob, cream white with set-screw
as used by:
Fender® 1960-­1964 for the Fender Bassman, Showman and Bandmaster Amp
and for several Fender Custom Shop and Fender Reissue amps:
Tone Master, Custom Vibrolux Reverb, Vibroking, Super Sonic Amp (blonde) etc.
With the set-screw this knob can be mounted on 6.3mm shaft as well as on 6mm shaft.