These manuals are bound so I didn't want to tear them apart for scanning unless someone really needs the PDF.

#1 - Circuit Data Corp Series CDA-770 Models 770, 771, 780

Telegraph Signal Analyzer - distortion meter

37.5-4800 baud, 5-8 level code, polar or neutral line

#2 - Dataproducts DMS-303A Data/Telegraph Test Set Analyzer

Military TS-3378/G - also made by Stelma evidently

similar function to above

In the event of multiple requests I'll ask if you want me to take it apart for scanning.

Cheers,