Constructo(1) / Build-O

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Constructo(1) and Build-O Construction Sets

Constructo(1) and Build-O appear to be repackaged Merkur. Not certain if they was made in Canada under license or imported from Merkur in Czechoslovakia. Constructo(1) came first in 1980 and Build-O followed on in 1981/2

Constructo(1)

Manufacturer / Distributor

Marketed by Parmount Industries, Montreal, Canada.
Not sure if made by: Science Master, 198 Churchhill Boulevard, Greenfield Park, Quebec, Canada.
Or Imported from Merkur, Czechoslovakia

Info from the Metal Constructional Systems Database for CONSTRUCTO [1]

Maker
Merkur

System Type
MERKUR type

Country
Canada

Dates
1980

Material
Steel

Thread
M3.5

Boss Type
single-tapped

Boss Thread
M4;M3

Diametrical Pitch of Gears
30

No. of Parts in System
97 (see comment *¹)

Hole Pitch (Spacing) (mm)
10.0

Diameter of holes in Strips(mm)
3.9

Diameter of the Bore in Bosses(mm)
3.8

Diameter of Axle Rods(mm)
3.7

Types of Nuts and Bolts
Nuts: hexagonal
Bolts: cheese (slotted)

Material/Finish of Nuts and Bolts
Steel

Size of the Nuts across Flats (mm)
5.9

Bolt diameter (mm)
6.0

Comments
Lid has boy, sometimes two, with several small models. Parts are from MERKUR & details are assumed the same.

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.

A Constructo(1) manual.
(23/05/2019)

Build-O