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Vintage 1977 Blue Box Script Octave Fuzz MXR M103 - $399
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Dated by serial #s on the pots shown.
9V battery wiring R&R a couple years ago.
Working and in Good shape for a pedal made in 1977.
There's an old price sticker on the box and also written on bottom of the box.
This is the crazy effect heard on Jimmy Page's "Fool in the Rain" solo. The Blue Box Octave Fuzz takes your guitar signal and duplicates it two octaves down for a huge, subterranean tone. The Blend knob lets you control how much of the fuzz tone is mixed with the two octaves down signal. Not for the timid—there is truly nothing like the Blue Box.