That slight slant is THE design feature for Eras. Unslanting it would probably be doable, but maybe not alltogether legal…

The Eras released by Adobe in the late eighties included two versions--the normal, slightly slanted version and an upright version. The upright version was intended for low-res (300 dpi) laser printers that would have noticeable jaggies on the slight angles otherwise. I don't know if the non-slanted version is still available, but that may be what they are using.

Note in folder of 1991 Adobe Copyright version of ITC Eras
A NOTE ABOUT USING ITC ERAS ON PostScript TYPESETTERS:

For best results on PostScript® Typesetters, ITC Eras® should be used at resolutions of 1270 lines per inch or greater. At this resolution the highly readable face shows the distinctive, slightly cursive letterforms designed by Albert Boton and Albert Hollenstein. At resolutions below 600 lines per inch, the printer uses a slightly modified version of the design in which the characters appear upright, but maintain the distinctive features of a large x-height, broad curves, open counters, and sharp angles.

Adobe and PostScript are registered trademarks of Adobe Systems Incorporated registered in the U.S.A. ITC Eras is a registered trademark of International Typeface Corporation.

Mark, I never knew! I wonder how much tweaking they bothered doing.

A side note: in my Nour&Patria system I have a slight slant but it's
just small enough that upto 16PPEM it won't render any jaggies.

hhp