Finally found the time to finish this phaser. Replaced the electrolytics, adjusted bias for the fets and it sounds as good as new. I really like the off board wiring done to it. Shielded wires for everything in the signal path.
The opamps have sanded but they are all seem to be LM1458:s.
The bypass switch is a nice, non-clickinging type. Never encountered them before. It’s not wired for true bypass.
The pedal works of a 9VDC battery but also have a DC jack, though the circuit uses +/- 4,5VDC from the power source so it can’t be daisy chained.