Petit-serif
From Infogalactic: the planetary knowledge core
Petit-serifs or petits-serifs are small serifs (petit is French for "small"), which are attached to regular sans-serif fonts.
An example of this is the version of London Underground's Johnston typeface created by Percy Delf Smith.[1] This was used at the Underground Electric Railways Company of London's headquarters, 55 Broadway, and some early 1930s Underground stations. A modern version, Johnston Delf Smith, is used by Transport for London for some historic signage.[2]
References
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