A.C. Gilbert markets his first construction set under the name "Erector" in 1913. Sets produced during this period were characterized by their wide, 1¼-inch girders and cardboard or unpainted wooden boxes.
1924-1932: CLASSIC PERIOD
Perhaps the greatest period of Erector glory. Sets produced during this period were characterized by their narrower (5/8-inch) redesigned girders, wooden cases (painted red beginning in 1928), and new parts and pieces. Most sets were designed to build specific models, such as the Steam Shovel, White Truck, Ferris Wheel, Zeppelin, and Hudson Locomotive and Tender.
1933-1945: TRANSITION PERIOD
This period was marked by a change from wooden cases to painted metal cases.
1946-1962: RENAISSANCE PERIOD
The post-war period during which I, as well as many of you, were first introduced to the Erector Set. The bright red cases typical of this period have become an icon to many of us Baby Boomers, and even to some of our younger "Generation Jones" siblings.