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KA-KA-HA Construction Sets

KA-KA-HA was a construction with similarities to Meccano and Eitech construction. It was made in the former East Germany from around 1950-53.

Manufacturer / Distributor

Phönix-Produktiv-Denossenschaft GmbH., Halle, Germany

Info from the Metal Constructional Systems Database for KA-KA-HA (Ref:KAK)

System Type
Hole pitch >12.7mm
Former East Germany (probably)
known in 1948 to known in 1952
Aluminium (Alloy) / Metal
Boss Type
no boss
Boss Thread
Diametrical Pitch of Gears
No. of Parts in System
34 (approximately)
Hole Pitch (Spacing) (mm)
Diameter of holes in Strips(mm)
Diameter of the Bore in Bosses(mm)
Diameter of Axle Rods(mm)
M4 (Screwed Rods or Bolts are used as axles.)
Types of Nuts and Bolts
Nuts: hexagonal
Bolts: pan (slotted)
Material/Finish of Nuts and Bolts
Steel with a Brass finish
Size of the Nuts across Flats (mm)
Large (like MÄRKLIN)
Bolt diameter (mm)

Black Strips, Brackets, & Angle Girders; red, blue, green, black Plates; red Pulleys; silvery Flanged Disc Pulley. Lid has large Suspension Bridge & other smaller models. Dates from JCM.

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

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

The KA-KA-HA manual for 1950-52
(Added 15/11/2018)

The KA-KA-HA manual for 1950-52
(Added 18/10/2018)

The KA-KA-HA manual for 1952-53
(Added 18/10/2018)

Various photos of the KA-KA-HA construction system
(Added 15/11/2018)