Wikipedia
FAC-System
FAC-System is a mechanical construction set, invented by Swedish artist Mark Sylwan in 1952. It uses mainly metallic parts, and extensively uses steel rod. The company continued in business , supplying kits stated to give industry a basic construction system which gives the same freedom in 3D design as is available from the drawing board and CAD/CAM. Kits are suitable, and priced as, for laboratory work and teaching.