Roselle Hellenberg Osk (1884–1954) was an American realist printmaker known for her drypoints and etchings.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Roselle_Osk

Six O’clock by Roselle Osk
c.1935 / Drypoint / Plate: 10″x8″ / Various collections, including Ackland Art Museum at UNC-Chapel Hill, NC

Roselle Osk on invaluable.com:
https://www.invaluable.com/artist/osk-roselle-h-gah5x6tnta/sold-at-auction-prices/

Further reading:
https://www.askart.com/artist/Roselle_Hellenberg_Osk/70786/Roselle_Hellenberg_Osk.aspx
http://www.artoftheprint.com/artistpages/osk_roselle_hellenberg_fdroosevelt.htm
Obituary:  https://wp.me/a4lKvZ-5UX