Structo model building.
This is a 1915 instruction catalogue from the Structo Manufacturing Co., a toy maker, showing how to build models from its perforated metal strip and bolt construction set for young builders. The pictures are black line drawings of assembled models such as a pulley hoist tower, a geared trolley on wheels, a machine with a crank and seat, and a small wheeled vehicle, each with its parts and bolt holes clearly drawn. A designer could take their crisp technical linework and the rhythm of repeated perforations as a model for diagrammatic or assembly-style illustration.
