This listing is for a Hickok 605a Tube Tester

The tube tester was plugged in and the tester does light up.  Line adjust working, as shown.

Clean tester both the case as well as the tester itself, see photos for details. 

Portable useful tester, will be great as it can test the antique 4/5 tubes as well as the 7/9 pin peanut tubes (12ax7 etc).

See photos for all details.

Results VERY CLOSE with my reference tubes, about 3-5% off where I would expect.  As with any vintage tester, you could certainly plan on a calibration and service, but could also be used as-is for reasonably close results.

Also to note: The power cord needs replacing, as it is exposed in areas.  Please plan on replacing for safety.  I carefully plugged in and used it, but in order to be safe, plan on replacing immediately. This is important for your safety.