If you love the first 2 Hendrix releases then you'll love this pedal, with 2 Germanium transistors hand-picked and tested for optimum performance. A Contour Knob lets you dial in Midrange, Harmonics and Sustain, also an "Input " knob that takes out the "woofiness" and gives great Overdrive/Distortion sounds when its level is reduced. An internal "Bias" Trimmer allows for adjustment of Clipping Symmetry, Harmonics, and Tracking.
The vintage 60's Fuzzface (no relation to any currently marketed likeness) is one of the most iconic pedals ever! Hendrix made 'em famous, and I love them for their ability to garner clean sounds, as well as sizzly leads.
The 69 pedal was my very first release, it came out in 1993 and went on to sell 3500 or so units until lack-of-suitable transistors forced its retirement in 2007. During its life I added some cool features like a variable input level control and a "Contour" control, which gains-up the pedal in Mid frequencies, and an internal trimmer to Bias one of the transistors, allowing you to tailor the sound AND feel of the pedal.