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Instructo Construction Sets

Instructo was a simple construction system which used tubes pushed into a variety of connectors. It was made in the USA, in (probably) around 1920.

Manufacturer / Distributor

Master Toy Co., Los Angeles, California, USA

Info from the Metal Constructional Systems Database for INSTRUCTO

System Type
Mainly Rods/Tubes
circa 1920 (some significant doubt)
Boss Type
no boss
Boss Thread
Diametrical Pitch of Gears
No. of Parts in System
Hole Pitch (Spacing) (mm)
(hole pitch, only for holes in wheels or discs.)
Diameter of holes in Strips(mm)
Diameter of the Bore in Bosses(mm)
Diameter of Axle Rods(mm)
6.4 (see comment *1)
Types of Nuts and Bolts
Nuts: --
Bolts: --
Material/Finish of Nuts and Bolts
--  --
Size of the Nuts across Flats (mm)
Bolt diameter (mm)

¼" rolled Tubes push into/onto Connectors. 8-spoke Connector can carry Tyre. Infill card Plates in known set may not be original. *1 Nominal diameter of Tube, also used as axle.

The MCS document for this system is shown below. It can also be downloaded to your computer if desired here

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The report can be zoomed into, made full screen or downloaded as a pdf document by using the controls provided

There are currently no manuals, leaflets or photos etc. available for downloading. If you can supply any, please get in contact with me.