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Wi-Di was a Meccano-like construction system, with the plates only having a few holes. It was made in Germany, by W. Dietrich of Hamburg in around 1947.

Manufacturer / Distributor

W. Dietrich, Hamburg, Germany

Info from the Metal Constructional Systems Database for WI-DI (Ref:W-D)

System Type
Hole pitch <12.7mm
known in 1947
Zinc (Alloy)
M3 (see comment *1)
Boss Type
no boss
Boss Thread
Diametrical Pitch of Gears
No. of Parts in System
23 (see comment *2)
Hole Pitch (Spacing) (mm)
6.0 (see comment *3)
Diameter of holes in Strips(mm)
Diameter of the Bore in Bosses(mm)
Diameter of Axle Rods(mm)
3.0 (see comment *4)
Types of Nuts and Bolts
Nuts: hexagonal
Bolts: cheese (slotted)
(see comment *5)
Material/Finish of Nuts and Bolts
Steel with a Steel finish
Size of the Nuts across Flats (mm)
Bolt diameter (mm)

The No.0 lid has a simple red crane. Parts: Strips, some with slotted holes, Plates, & wooden Pulley. *1 & 3x.6. *2 In No.0. *3 Multiples, & others in Plates. *4 7.8mm diameter wood Winding Rod with 3mm diameter steel ends. *5 +5.6mm diameter round head.

Pages from the 'Other Systems Newsletter' which contain information on this system are shown below. They can also be downloaded to your computer if desired here

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Below there are manuals/leafets/photos which can be downloaded by clicking on the appropriate image.

The instructions for Wi-Di set 0.
(Added 05/11/2023)

A photo of Wi-Di set 0.
(Added 05/11/2023)