How to identify specs of guitar pots and capacitors?
Capacitors are ceramic disc type, 203M 100V meaning 20 × 10^3 = 20000 pF = 20 nF, M = 20 % tolerance, and 100 volts.

It seems you found it is a 100 Kohm pot. You can verify that by using a multimeter, measure resistance from two end pins, not from the middle one. The pot that is nearest your finger is easiest to measure, bottom pin is not connected and top pin is connected to case for grounding purposes. As middle pin connects only to a capacitor, it does not affect measurement result.