There are thousands of pieces of vintage sheet music available for collectors and curiosity seekers.
Prior to the 1930s, a big percentage of them had incredibly hand-lettered titles on the covers, but slowly there was a shift by music publishers to utilizing metal type for the bulk of their output.
Normally embeded in all-caps format, specific typefaces come back in growing frequency and familiarity.
Composer JNL is one such example of a "workhorse" font and has been re-drawn and reinterpreted by Jeff Levine Fonts in both routine and oblique versions.
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