What I have found so far

Tapes of interest:

• 169255.tape (System binaries, TOPS-10 v703, likely KL)
• 169285.tape (MACRO-10 v53, EOF termination error on the last file)
• 169278.tape (?)
• 169280.tape (CUSP)
• 169249.tape (Files from X930, 1987)
• 169250.tape (Misc. X930 files, 1983)