Up for sale here is this vintage 1982 CTS 50k ohm linear taper potentiometer.  This is a vintage "dishback" pot and is dated 1982.  I have a few of these, all with the same date code.  This measures around 41k-43k ohms.  It has a short 1/4" D shaft, so any standard 1/4" D hole knob or 1/4" knob that locks on with a set screw should fit.  This is guaranteed to work great for you, though it may need some Deoxit. The terminals have a little vintage solder and wire bits on them. This is a pretty rare potentiometer and would be great on your guitar or amp. Please see my pictures for details.

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!