The font used for the Knights in Armor instructions appears to be a version of "Univers".
Unfortunately the version used is not the same as the versions I've seen digitized.
Before personal computers, there was a version of Univers created for an early typesetting system that had the characters forced to fit within a small set of predetermined widths. It was an early attempt to bridge the gap between a typewriter (with all characters being the same width) and real typesetting.
In your scanned sample, the character shapes match Univers, but some characters are narrowed (ex: S, W, e) and some are widened (ex: Y). The cent symbol is a lower case c with a slash typed over it.
Maybe it doesn't matter. I'm not sure how picky collectors are.