It's from Keithley's best industrial design period. It has good accuracy and stability. It has nixie tubes.
1617-A Capacitance Bridge General Radio GR GenRad Capacitor Tester+Manual! 1617A
30 mar 2016
Because sometimes a biased test is what you really want
This is the capacitance tester you want for electrolytic caps. Built-in bias source goes up to 600V, and shows you leakage current. Takes kelvin clips for 4-wire connections. Safety features are well thought out, but you can make some simple internal mods to disable the high voltage settings.
The usual 20x DL is PH2, not typically found on the Nikon Universal Condenser. Fluor color correction and unusually high resolution and contrast, but not plan—not even close.