Staedtler Mars Lumograph

Staedtler Mars Lumograph, Staedtler
Central Intelligence Agency from Washington, D.C., Public domain

The blue pencil for draughtsmen and architects, in many grades.

The Lumograph gave a dense line that could be copied. It has been a standard among draughtsmen.

Materials: Wood, graphite and clay

Manufacture: Made in Nuremberg.

The blue lacquer with a black end.

The grade printed on the pencil, from soft to hard.