With a fax generation or something thrown in for good measure.
Look at the characters with horizontal serifs [e.g. on the letter "I"]. Notice that on the CBS decouments they are often concave on the outside. I don't know of any analog copier that would do that; it is much more likely to be a faxing phenomenon.
Whatever was used in at least one step of munging these documents to make them look old had a minimum vertical thickness [i.e. thickness of horizontal lines]. When something was too thin in the vertical direction, this device would attempt to place a minimum-thickness vertical line more-or-less centered vertically about where the original mark was.
Because Times New Roman has curved serifs which are thinner than the minimum vertical thickness, the curves on the insides of the serifs caused the whole serifs to appear bent.
I don't know what variations exist among fax machines, but I would think a forensic expert could probably determine which types of machines might have been used.
The forensic experts have already said that the serif information is lost.