I originally purchased some cheap copies from a Chinese ebay vendor but they were totally useless. At a distance they looked the same but up close they looked cheap, numbers were blurred, etc. They didn't fit properly either, the sockets were too loose. So I got these original Fender knobs instead and of course they look great and fits tightly to the pots. I needed these for an old Fender Musicmaster Bass Amp but I'm sure they will be a perfect match for any Fender amp.
Great quality, it just shows that it's usually smart to pay a little extra for the original product.