Furnishing for Kass Country Residence, Berlin-Zehlendorf, 1932: Sofa: perspective sketch

Ink on paper

Colored crayons on paper

Graphite with green, blue and brown crayon on paper

Ink on paper

Ink and marker on paper

Graphite on paper

Graphite and blue crayon on paper

Black marker and black pen on paper

Graphite on paper

Black and red marker on paper

Graphite on paper

Black and red marker on paper