Up for sale here is this set of 2 NOS vintage Mallory 500k ohm audio taper potentiometers, dated 1956 and Made in USA. Each has a short round 1/4" D shaft, so any standard 1/4" round knob that locks on with a set screw will fit, as will any "D" shaft knob. 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 guitar or amp. Please see my pictures for details, measurements, and sample test results.

US shipping and handling is $5, and international is $18, 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!