AG57 is a digitization of H. Bertholds’s 1898 typeface Akzidenz-Grotesk made freely available as a cultural artefact. More in the linked article (in German, which alas! I cannot read).
(Via Ich-AG, typografisch – H. Bertholds 'Akzidenz-Grotesk' für Ihren Computer - SBB aktuell via @espiekermann on Twitter)
