For sale is reprint of 2 manuals for Hickok KS-15559-L1 KS-15560-L1 Tube Tester made by Hickok for Western Electric. 1st Manual was released by Hickok and is 10 Pages long. 2nd manual is  a 23 page Bell System Practices Manual with 11x17 foldout of schematic diagram. Schematic is dated December 1952.  Hickok Manual includes 4 page chart with ballast tube testing chart and part list.  Real Paper Manual. Quality Printed and Comb Bound. Printed from available copy or scanned from original at 800dpi, restored in Photoshop, Laser printed on premium acid free paper, they will serve for years. Most manuals Include foldout of Circuit Diagram. Cover page printed on Cover Stock.