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.