Born in 1925 in Germany, Gustav Jaeger, son of a printer, studied at the Hochschule für Gestaltung in Offenbach am Main. From an early age, he was enthusiastic about lettering and type and began his career with the Bauer font foundry, developing specimens promoting the work of both Konrad Bauer and Walter Baum. Encouraged in his work by Bauer, he went on to design contemporary 1970s display typefaces for the H Berthold AG foundry. He progessed to text typefaces with Seneca released by Berthold in 1977 as part of the Berthold Exklusivs. Jaeger followed with Aja (1981), Catull and Cosmos (1982), Delta (1983), Jaeger Antiqua (1984), Daily News and Jersey (1985), Bellevue (1986), Chasseur (1988), Cornet (1989), Donatus and Prado (1990).