Really nice booster pedal from Western Germany. 5 position rotary switch goes from spanky treble tones to fat/muddy bass.
I didn’t take any voltage reading, but I can do that if requested
If you need any more pics or info, please ask. Enjoy…







Schematic…

The 47nF cap on pole 7 to ground is a little redundant as it just switches parallel to the 100nf in position 1 (Bass1 in schematic), so you could just use 150nF there