For sale is reprint of Precision Apparatus Company Tube Tester model 660 Manual. 25 pages long, Manual comes with Part List and Circuit Diagram. Date on schematic is January 26 1957.
Manual also includes 21 pages of transistor and diode testing data, 10 page interim supplement dated 10/63, 3 page GG supplement, 1 page DA-JH supplement, 1 page FS (12-57) supplement, 1 page 3-58 supplement, 5 page operating instructions for G-140 adapter and 21 page tube test data dated 10-1-65. If you purchased one of those testers from Ebay and it did not come with Manual, here it is. Looks like Manual was Mimeorgraphed as it was printed one sided.