Otto Kuhler, German-American, 1894-1976, "The Fast Mail". Pencil signed, printed in 1923. 6 x 8 inches on 9 3/4 x 12 3/4 laid-type paper. Kuhler was one of the best known industrial designers of the American railroads. He learned etching after World War I and enrolled at the Academy of Art in Düsseldorf.