Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Balconies: perspective sketch

Black conté crayon on ivory tracing paper

Black ink and blue pencil on cream wove paper

Crayon on paper

Graphite and colored pencil on cream wove paper

Watercolor on off-white wove paper

Crayon on paper

Watercolor and graphite on cream wove paper; verso: black ink and graphite

Graphite on thin off-white wove paper

Graphite on off-white wove paper

Charcoal on cream laid paper

Graphite on blue wove paper

Pastel on brown wove paper-faced illustration board