Here is a Beautiful Vintage 1963 Early Version, Hickok 539C 539-C Mutual Conductance Tube Tester - Mint with Aftermarket Manuals and Obsolete & Foreign tube data Binder and grid cap leads. Serial # 29200124. This came from a working tech bench of a private estate and is in amazing condition. By far one of the nicest and cleanest 539-C\'s I have had. The interior is stunning. The roll chart moves freely and the window lens is crystal clear. The meter face is spotless.The exterior has only a few scuffs as shown. It tests tubes very accurately when compared to my other Calibrated TV-7 & TV-3. It was recently calibrated by Kara Chaffee at tubewizard.com and comes with a full calibration diagnostics sheet. It meters right on using a 6L6 calibration test tube. This is in excellent original condition from a private collection. This will make anwonderful addition to anyone\'s collection. Money back guarantee you will not be disappointed.As always, all of my sales start at $9.99 with and I offer a 60 day money back guarantee. Click the \"Enlarge\" tab to view all 12 pictures for details. Email, text or call Mike with questions. [phone removed by ]. I do not offer Buy-It-Now\'s and do not end my sales early.Buyer to pay actual shipping of 33 lbs.