Hickok 6000A Mutual Conductance Tube Tester 
Late model 6000A and tube chart is dated 1974 and easily moves from end to end. The Original Hickok case is in really nice shape with minimal wear that is mostly on the corners.
 
Please see the calibration report in the pics for further details pertaining to the specs and other work done.
 
New Simpson 29 Meter calibrated for the Hickok 6000 series tester @ 100 microamperes and 1165 ohms. Very smooth slow movement with no banging at either end, and easy to adjust to the line. A NOS 150uF capacitor was added, and proper diodes were added to protect the meter.