Slashed over, unfinished self-portrait discovered on the back of factory workers on the way to work in 2003 by paper conservator päivi ukkonen. Stamped with a customs mark. The main painting was displayed for decades without anyone realizing this was at the back. Object Type: painting. Genre: self-portrait. Date: 1921. Dimensions: height: 44.5 cm (17.5 in) ; width: 50.1 cm (19.7 in). Medium: oil on canvas. Depicted People: Helene Schjerfbeck. Collection: Riihimäki Art Museum. Helene Schjerfbeck - Unfinished Portrait