Vintage Heathkit Model HD-4040 Terminal Node Controller Series 02-5764. Powers on but not tested so selling for parts or repair; missing one rubber foot on the bottom; power cord had two worn areas (see second to last area) so put electrical tape over it (last photo); lid pivots up but missing the two screws that screw it down; some light rust noted on a couple of internal screws, so probably has had exposure to humidity in the past; 4 bulbs light up when plugged in.