A TWA manual for a 707 had very little applying to a PanAm 707...
So very true, and just one item...hydraulic system interconnect on the PanAmerican airplanes definitely did
not apply to the Trans World airplanes, whilst airbourne....among many other differences.
The 707 was different for each original customer, and it showed, when some 'know it all' pilots perceived to actually 'know it all'.
...when they had no idea whatsoever.