Steelbuilder construction toys were manufactured by the Steel Builder Company of Newark, New Jersey, a division of Acme Metal Goods Mfg. Co. The sets were built on a different principle that Erector or Meccano sets. In addition to girder system, the Steelbuilder sets used a series of panels. The panels and girders slid together via a series of grooves and slide fasteners with a few key screws holding everything together.. The parts were colored blue and yellow with a matching instruction booklet also in color. The set illustrated below is from 1934.
