Colorsound Overdriver pedal by Sola Sound. Classic collectible guitar effects pedal from late 70s. Been in storage for many years. I originally purchased in 1982. Overdrive and footswitch work fine, bass and treble controls don't seem to have much if any affect. All parts present including battery holder for 9v battery - have just tried a band new battery and fits perfectly. Pedal has an aged appearance, obviously, with marks as you would expect of a vintage item. Could use some TLC and perhaps electrics tidying to restore tonal controls. I include a photo of the internals. If you've read this far you are probably well aware what you are looking at. Sensible offers considered.