Unknown wooden system & OKWA (Zet-Z-Op)


Unknown old construction set, very similar like OKWA (see details below), but this wooden system is a bit bigger.
If you know the name and/or manufacturer of this construction toy, please let me know!

Rare old wooden construction system.


OKWA ZET-Z-OP

The wooden system above, is very similar to this OKWA Zet-Z-Op system.

OKWA stands for Okkerse Waddinxveen. The Okkerse family established the factory in 1901. One of the first real wooden toy factory in the The Netherlands. These sets are produced around ±1969.

More info: mobaco.nl/OKWA

Boxes & content:

The yellow box is already big (41x38x3.5 cm), looks similar like the blue version. Parts in the yellow big box:

PartsAmount
Columns12
Pins14
Yellow doors2
Blue windows2
Black windows2
White walls4
Green fence3
Grey floor plate 1 bay2
Grey floor plate 2 bays1
Roof plate 1 bay2
Roof top 1 bay1

Some system characteristics

Here a short list of some system characteristics and how it’s retrofitted into the virtual LeoCAD library:

Part types:Original:Virtual:
WoodWood
27×27 [mm]
Single color piece
Wall panelWood
118×118
Single color piece
Pitch size138 [mm]138 [mm]
Wooden system
Part types:Original:Virtual:
WoodWood
21x21x100 [mm]
(groove: 2.2×5)
Single color piece
PinPlastic
D6x50
Single color piece
Wall panelPlastic
100x100x2
Single color piece
Pitch size112 [mm]112 [mm]
Z-Op system (1960s)

Library information of both systems

Here an overview of the parts library:

The single category, consists of these part types:

Part types:Number of parts:
Unique shapes initial13
Unique shapes 1960s11

LeoCAD

Comparison both systems