Otto Birckhahn

German recording engineer.
Born 12 January 1877 in Berlin, and died 21 April 1945 in Berlin-Steglitz, .

In 1902 he accompanied William S. Darby on a recording expedition to Russia for Grammophon; in 1904, he was head of the Gramophone Co.'s Berlin office.
By 1907, he served as a Director for the Carl Lindström A.-G. in Berlin, g with a handwritten "OB" that can look like "CB".