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Locarno Construction Sets

Locarno was a very simple Meccano-like construction system. It is thought to have been made in either France or Switzerland.

Brief details - Distance between holes 12.30 mm., Diameter of holes 4.5 mm. Number of different part types 18.

Manufacturer / Distributor

An unknown company from Switzerland

Info from the Metal Constructional Systems Database for LOCARNO

System Type
Meccano principle but sig. differences
Switzerland (some significant doubt) (see comment *1)
4x (see comment *2)
Boss Type
no boss
Boss Thread
Diametrical Pitch of Gears
No. of Parts in System
18 (approximately)
Hole Pitch (Spacing) (mm)
Diameter of holes in Strips(mm)
Diameter of the Bore in Bosses(mm)
Diameter of Axle Rods(mm)
Types of Nuts and Bolts
Nuts: hexagonal
Bolts: round (slotted)
Material/Finish of Nuts and Bolts
   with a Black metallic finish
Size of the Nuts across Flats (mm)
Bolt diameter (mm)

*1or France. D't'ls from only known set. Green Strips, with black Angle Bracket, N&B. No Wheels.. White label on mottled brown lid, it & manual cover have name, Les Constructions Métallique, & logo. *2not M4 or 5/32W.

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

A Locarno instruction leaflet.
(Added 16/06/2020)

A photo of Locarno parts.
(Added 16/06/2020)