1967 Precision Supplementary Tube Test Data for 640 and 660 Tube Testers

Description

For sale is reprint of Precision Apparatus Company Supplementary Tube Test data for 640 and 660 Tube Tester. Book is 48 pages, For Use With Roll Chart TRC H2B. Tube Data is dated January 2nd 1967.
If you purchased one of those testers from Ebay and it did not come with Tube Test Data or your roll is out of date, here it is.
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. Cover page printed on Cover Stock.