For many years, the "default" typeface on most series of Teletype Corporation teletypewriters was one called "Murray", named in honor of an Australian who was one of the "godfathers" of the teletypewriter. Its design was intended to minimize the visual awareness of angular misalignment of the characters, as might come on a typebar printing mechanism with extensive use and the accompanying wear. It retained its primacy, for "continuity", even on a later series of mchines not at all susceptible to such misalgnment.
When Teletype corporation developed its first "low cost" teletypewriter series, as the "default" typeface they used a variant of Murray, less in height to suit dimensional limitations of the printing mechanism. It was given no name. I suggested it be called "Dwarf Murray". Teletype Corporation did not take me up on that.
Best regards,
Doug