For documents that were to be photographed ... and then to plate/print... you used a typewriter with a limited variety of 'spaced-fonts'. 'Hot-type'(galley type) was still being used for legal documents back then.(1971-1973)
Photo-type was used exclusively for upscale catalogs, brochures, slides and overhead presentations.
That the National Guard in 1972-73 would use photo-type(the only way to get real superscript) in a series of 'memo's' is a scam of monumental proportions!
Andy Rooney did it. He's the only man in America who still has a functioning Underwood.......