American Skyline was a construction set sold in the late 1950s and early 1960s by Elgo Plastics/Halsam Products Company from Chicago, Illinois. With an American Skyline set, its owner could piece together models of high-rise city buildings. Set contents The set consisted of a collection of three different types of plastic parts; column segments, vertical panels (which included windows and doors), and floor panels. Doors were simple plastic pieces and did not open. They came in single, double, and 4-door designs. Windows were single, double, triple, and a 7-window design as well as a unique bay style with single and double large open windows (which can also be used as room door ways to divide rooms if one wished). There were also base blocks, step blocks and rails which were used in the foundations of the structures being constructed. The step blocks were also used in other parts of the structures. The pieces all tend to be fairly durable except for the columns, which tend to have sides broken off with many years of use. The roofing and floor bases were basic thin plastic sheets with a checker board motif in white and brown to one side and blank white on the other. The column segments interlocked to form stacks. Each such stack would present four tracks running the length of the stack. The vertical panel pieces had edges that could slide into the tracks. Panels slid into adjacent tracks in the same column would be at right-angles to each other. The floor/roof panels had corners cut in such a way that each corner could be held in place between two column segments. Also included were flag poles to attach flags to, flags were found (printed) on the back page of the instruction booklet to the sets. Attachment was cutting them and folding them then simply pasting them to the poles. Set versions Sets were sold in six different versions. The sets came in six different sizes. They originally came in flat boxes, then Cardboard canisters with a metal top. Note: (Set No. 96 seems to have been issued in a flat box only). These sets other than how they were boxed were identical. Elgo/Halsam issued a 3rd version of these sets, the other difference was that this last version came with colored plastic windows (in amber, blue and green) and had more total pieces than the two earlier versions