A Didot revival designed in-house at Ludwig & Mayer in 1929, “based on 18th century originals” [Schriftkartei Ludwig & Mayer], spanning regular, italic, and bold styles. Jointly issued with Krebs. [specimen]
The upright styles were digitized by URW as URW Firmin Didot (1995). Didot LP Display (LetterPerfect, 1990) is very similar. Unlike its name may suggest, HiH Firmin Didot (HiH, 2008) is different in design.
Photo(s) by Philipp Messner on Flickr.