---Do I think it is possible that the National Guard had this "professional typewriter" in '72? It had been available for at least 3 years, and if you were accurate, it was easy to use.---
But the type writer used mechanical means for it's proportional spacing, something like 5 micro-spaces for an m and 2 for an i. What are the chances that an electronically spaced font like Times New Roman would give the exact same spacing?
Times New Roman was a standard font in 1969, and it was available in 10 and 12 with proportional spacing. We had 6 little balls for our Selectric. We had a cursive font, at least one Times New Roman fonts, a Courier font, a symbols font, and Greek letters.
You wouldn't get the exact spacing if unless the exact same typeface was used. Even TrueType and Adobe versions of a font often have subtle differences from each other.