Hickok 539B Tube Tester. Serial #1821184.Dimensions are 17\" x 19\" x 6 3/4\".  Net Weight 25.2 lbs/11.4kg.  Gross Shipping Weight 28.0 lbs/12.72kg.This is one very clean Hickok 539B Tube Tester. Just recently calibrated last month.  Now working like a charm.  Just put your tubes and start testing!  Ease of use.It had a bad meter and I was able to purchase a brand new meter and had it installed. Now works great! Inside is very clean.  This one has one of the later wooden cases judging from the looks of the hinges.
However, it is MISSING THE TOP COVER.  
Previous owner lost the cover and could not find it. 
No manual as well.Thank You and Good Luck : ) : )
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