A font based on that used by certain chain printers (or similar printers) in the 1960s-1970s era. This font was generated using a single set of printouts, and might be the font from the IBM 1403 chain printer (with the 120-character "T" chain installed, for the math symbols... if this actualy is the "T" chain, there should be lowercase letters as well...).
EDIT 20250418: It is possible that this font is actually a variant of IBM "Letter Gothic" from an ASCII Selectric typeball or a daisywheel, although not all the characters match that, specifically the 'J', the '*', and the '4', so it could be some variant of it.
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Where are the lowercase letters?
Only certain chains of the IBM 1403 printer actually had lowercase letters.
The 1403 chain printer has 240 total characters on the chain, each 'segment' of the chain has 2 letters on it.
The printout this font was based on did not use any lowercase characters, and also used some unusual math symbols which implies it may have used a custom chain, assuming it was printed on an IBM 1403 chain printer at all, and not a daisywheel or other printer type!
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