Top notch Oil Can Delay restauration by the one and only Uncle Doug.

[cooder]

Superb. What a wonderful beast of technology.
And the sound (go to 43 min for guitar sound check).

I need one. Sigh...

[mjg]

Wow, that certainly is unique!  I love the mechanics that go into those old sorts of effects.  And the sound is ... yeah.  It's different... 

[lars]

Yeah, that sound is.... It actually sounds a lot like a bad flanger pedal that tripped over a theremin:  (think the default "flanger" setting on cheap digital effects that are built into combo amps).