Here\'s a really niceChicago Industrial Instrument Co.Model TC-532 Tube Tester that\'s in wonderful condition! There are no intermittent or dirty contacts, switches or controls, and all controls operate easily and smoothly. It tests a wide range of tubes, and is easy to set-up for a specific tube.I had a good 5R4 laying around here, and was able to test it. The chart is bright white, easy to read and not torn. Also has a built in Voltometer, and requires a couple of C cells for operation. As you can see in one image the Line Adjust control easilyset the needle to the Calibrate line. It\'s a sharp looking unit withblack and dark red knobs.Because if its age I\'m selling it as Not Working or For Parts Only!Thanks for looking!