[DB]

The IBM Selectric ball type electric typewriter could do proportional print but not the super script shown on the "document". I believe a typesetter would be the only one that could produce the document as it is shown in 1972.

[Bogey78O]

It could do special symbols if the typist went back and changed out the rotating ball. But it still is using modern Times Roman for Word Processors and not the typewriter Times New Roman common in 1972.

[DB]

LadyJane pointed out she didn't think there was an IBM Selectric typewriter with proportional spacing. After searching the topic with Google she is proven correct.

Here's a quote from the lower Web address:

Although IBM had produced a successful typebar-based machine, the IBM Executive, with proportional spacing, no proportionally-spaced Selectric office typewriter was ever introduced. There was, however, a much more expensive proportionally-spaced machine called the Selectric Composer which was considered a typesetting machine rather than a typewriter.

From: http://www.nationmaster.com/encyclopedia/Typewriter

Thanks for the heads up LadyJane