MuTron Phaser Guitar Bass Synth Pedal

via this auction

"What a great pedal!
It does two things that any great one should:
-works well
-sounds like magical mystery
For the geeks out there, it is worth noting that this very pedal is the first phaser design to use OTA components rather that FETs, resulting in a much clearer, less noisy effect than it's competitors."

inside a MuTron Phaser