Many years ago I created two upside-down typefaces, UpsidedownJJ and UpsidedownTOC. They were based on monospaced or typewriter fonts, and were rotated 180 degrees, which is the same as a vertical flip followed by a horizontal flip.

Recently I was reminded that this way of creating an upside-down typeface is not the only way to create an upside-down typeface--a simple vertical flip creates a different one.

That is what this typeface is, a simple vertical flip.

The original typeface on which this one is based is JetJaneMono.