Hickok 539C with Bias & AC Line Jacks for Digital Meters
Calibrated with cosmetic issues - Spots all over the face of the chassis and the case is also cosmetically challenged and selling at a discount. 
The tester is solid and works great, and only has cosmetic issues.
Meter was cleaned and is calibrated.  
I doubt very much you will find a calibrated 539C for less, but it just does not look so nice due to the what appear to be small corossion spots on the face of the chassis.
Please see the pictures for details and the close up shots of the spots.
See pictures 6 thru 10 for calibration specs and information that includes the added bias and AC line jacks for this 539C. These 6 pages should tell you all you need to know about this 539C.
No trick to use the jacks just plug in a multimeter or other accurate DCV digital meter in the 4mm banana bias sockets, red to positive and black to negative, and it will read the actual DC bias voltage being applied. Same with the AC line jacks; just plug in a multimeter or accurate digital ACV meter in the 4mm banana plugs and it will read actual AC voltage.
                                                          
Please see the calibration information in the pictures.
 
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