Oil/cardboard/wood, 26 x 40 cm, lo. ri. sign. O. Dinger. - German portrait a. genre painter, etcher a. illustrator. D. studied at the Düsseldorf academy a. as pupil of Köpping in Berlin. He emigrated to the USA a. worked in Milwaukee before returning to Berlin in 1889. Since 1904 he exhibited at the Große Berliner Kunstausstellung. - Lit.: Thieme-Becker, Bénézit, Merril: German-American Artists in Early Milwaukee.