[roll_the_dice]

I was cleaning out my garage and I forgot I had this. NOS Kelsey Hayes Electric Brake Controller for trailers. Kelsey Hayes #81740. It is brand new in box (NOS) and has all wires, controller, brake line, and even the full instruction booklet.

I would say it is from the early 70's although the instructions mentions 1960's vehicles.

$75 shipped