'Other' Constructional and Allied Systems Info & Downloads
Duplex Standard Construction Toy
Duplex Standard Construction Toy was a development of the Erector construction system with alternate large and small holes for sale under stores own brand names. It was made in the USA from 1927 to 1932. It is believed to have been sold under the following brand names:-
Little Jim - by J.C. Penney Department Stores
Steel Tech - by Montgomery Ward & Co.
Trumodel - by Sears Roebuck (The Kelmet Corporation)
Steel Engineering - by an unknown company/store.
Initially, separate manuals were supplied for the various brand names. However later on in 1929 some manuals were issued without the relevant brand names. Presumably to save on costs.
Manufacturer / Distributor
The A.C. Gilbert Co., New Haven, Connecticut, USA
Info from the Metal Constructional Systems Database for DUPLEX STANDARD CONSTRUCTION TOY
1929 to 1932
12.7 (multiples of value shown, including half.)
4.4 (see comment *1)
Bolts: round (slotted)
Steel with a Nickel plated finish
Generic name of modified ERECTOR with alternate large & small holes in Strips, Plates. Sold by stores under brand names, see LITTLE JIM , STEEL-TECH, STEEL ENGINEERING [2, TRUMODEL. Data from LITTLE JIM set. *1 & 6.6.
The MCS document for this system is shown below. It can also be downloaded to your computer if desired here
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Below there are manuals/leafets which can be downloaded by clicking on the appropriate image.