What the heck is this?

[ebacon]

It's a chronographic bimodal monostable multivibrator.

 

[Jenkster]

Maybe it's The Uranium Pu-36 Explosive Space Modulator?

 

[mr_fred]

It's used to reform the flux capacitor.

Not quite -- it is a calibration machine for a flux capacitor. It's commonly called a flux capacitalibrator. Very rare. You should put it on Ebay and set the BIN for at least USD $2K.

 

[jsisk]

The counter has a date of Sept. 1967

It is obviously a Spherical Hyperdrive Instant Wayback Machine

Directions for use:

1) Remove all metal objects from your pockets
2) Set dial for desired length of trip (1 to 100 hours)
3) Press big yellow button

Rendered obsolete by the release of the Rolling Stones greatest hits album.