Heinrich Hoerle, Worker (Self-portrait in front of trees and chimneys) Circa 1930 Corresponding graphite sketches on the reverse 61,5 × 46,7 cm Graphite on Japan laid paper Minor margin imperfections Piktogramme, Lebenszeichen, Emojis: Die Gesellschaft der Zeichen. Düren, Leopold-Hoesch-Museum & Papiermuseum. 2020/21 Auction 607: Kunst des XX. Jahrhunderts. Lempertz, Cologne, 4./5.6.1985, cat. no. 397