Is this a cruise control unit?

[Cash3481]

Anyone know if this is a cruise control unit mounted on the D/S inner fender. It has the speedometer cable hooked to it and then another spedo cable running to the transmission. It also looks like there was a wiring harness plugged into it previously but it is long gone. I found a knob under the dash by the drivers left knee that goes nowhere and am assuming it was the controller/potientiometer maybe?
In any case I was going to sell it and have no idea where to start.
I appreciate anyones input or knowledge.

Mike