For sale is reprint Precision Apparatus Company E-300 Sine-Square Wave Signal Generator Manual. 20 pages long, Manual comes with Part List and Circuit Diagram. Date on schematic is June 30 1954.
If you purchased one of those Generators from Ebay and it did not come with Manual, here it is. Looks like Manual was Mimeorgraphed as it was printed one sided. Font is smaller than usual but manual is clear and very readable.