Classic 1980's Overdrive Tones are so easy to achieve with this Vintage Japanese Made Pearl OD-05 Overdrive.
The secret? The sweep-able active tone control! It's almost like having a fixed-wah inbuilt , along with 2 of the benchmark JCR4558 chips.

This example is in WAY above average condition for 40+ year old pedal & comes with the original box, as shown. Sorry, no other paperwork etc included. In great working order.

from Pearl via effectsdatabase;

The Overdrive creates an overdriven tube  amp sound. Pearl OD-05 has an equalizer which creates various overdrive tones. This equalizer has a frequency range of 100Hz-4KHz and gain of +/- 15dB, so you can select various tone colors.