Up for sale here is this set of 2 vintage Clarostat 25k ohm 2-watt potentiometers, dated 1965 and Made in USA. I think these are S-taper pots. One is NOS and the other has a slightly sawed-off shaft, though I think it's still NOS. Each has a short to medium-length round 1/4" shaft, so any standard 1/4" round knob that locks on with a set screw will fit. These are guaranteed to work great for you, though they may need some Deoxit. These are pretty rare potentiometers and would be great on your amp, though they may be slightly too big for a guitar. Please see my pictures for details, measurements, and test results.

US shipping and handling is $7, and international is $21, no matter what quantity you buy. All my small parts are set up for combined shipping, so just use the "add to cart" feature and then check out all at once, and it will combine shipping. If you have any questions, please ask.

I have more pots and other vintage electronics listed--feel free to take a look!