Bing's constructor: the up-to-date construction toy.
Bing's Constructor is a 1914 construction toy catalogue from the Bing company of Nuremberg, showing metal-tube and rod building sets for children to assemble mechanical models. The pictures are monochrome line-and-halftone drawings of assembled machines with dimensioned tubes, wheels and cranks, and a designer might take from them the clean, exploded-diagram style of technical illustration and the precise linear rhythm of rods, joints and flywheels.
