Gerta Overbeck was a painter, teacher, and a participant in the German New Objectivity movement
Biography on FemBio: https://www.fembio.org/english/biography.php/woman/biography/gerta-overbeck/

Six-day race Westfalenhalle Dortmund by Gerta Overbeck
1926 / Indian ink drawing on paper / 8 4/5″x11 1/4″
Museum for Art and Cultural History of the City of Dortmund, Germany

Gerta Overbeck on Artnet: http://www.artnet.com/artists/gerta-overbeck-schenk/

Further reading:
https://www.gseart.com/artist/gerta-overbeck-schenk/bio
https://www.widewalls.ch/magazine/gerta-overbeck
Google translation of “women / ruhr / history” site