Bahner Residence, Berlin, Klein-Machnow, 1933: Letter box: elevation and section, 1:10

Gray, blue and brown crayon on paper

Black and green marker on paper

Black marker on paper

Oil, graphite, fiber-tip ink, on vellum

Paper

Black marker on paper

Graphite with yellow and blue crayon on paper

Graphite and green crayon on paper

Colored marker on paper

Colored crayons on paper

Black crayon on paper

Black, blue and yellow crayon ; black crayon on paper