This is the profile of a lovely dark haired woman. It is titled "The Eternal Question" and is signed in the plate by the American artist Rolf Armstrong (1889-1960). He was a well known illustrator and did many portraits of women, especially pin up art. It also shows "© Knapp Co., Inc. N.Y." The publisher was in business from 1888-1929.
The image of the woman is under a black matting. It is in a gold wood frame with glass, a cardboard backing, and a wire for hanging.