Jennings Pedal Phaser

Heres an interesting one:

This is a Pedal Phaser made by Jennings Electronic Industries (JEI) in 1974, but this is not branded as such. There is no branding on this. it confused me a little as the circuit board is not a Jennings one, it looks like that was made by EML Ltd, which i believe we're a USA based Synth manufacturer. 

There is some good info on these on the Voxac100 Website

It states: The JEI Phaser is quite unlike modern phasers, its swoosh and sweep being calmer and more musical. Much as with a wah, the pedal gives one the ability to regulate the effect by foot. The gain generated by the circuit is immense.

I can confirm the output of this thing is Immense, almost like a cranked boost, it really pushes an amp and sound really great.