“An instructive architectural toy”

Invented by William Bailey and first patented in May 1915. Manufactured by William Bailey Ltd, Birmingham, England and sold during 1916-1930s.

Other sources:

Ebook: Building Toys: Bayko and other systems
Museum: brightontoymuseum.co.uk


First patent: GB 191500382A, date of application: 19th Jan. 1915:

More existing patents:
FR: 1915 Dec. : FR480566A
CH: 1916 Jan.: CH72742A
DE: 1920 April: DE320132C
AT: 1921 March: AT83015B

On the box cover, also other countries are mentioned:
Australia, Canada, Italy, and New Zeeland.

Boxes available

There are 6 basic sets, numbered from 0 to 5.
Set 0 contains 111 parts and Set 5: 1168 parts.
There are also ‘Accessory Sets’, from 0a up to 4a, for upgrading that standard set.

Parts & building instuctions

There are 27 different parts available.

Wenebrik: Building with Set No. 2:

Wenebrik: Set 2 – Model 36.


The only manual I’ve (with BW front cover):

Another manual with colored front page: meccanoindex.com

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:
Steel platesMetal, painted
Thikness: ~0.35 [mm]
Single color pieces
Bay size1.5 [inch]tbd [mm]
LeoCAD settings:
Draw line every X studs
Snap XY1 [mm] 1/20 stud
Snap Z1 [mm] 1/20 stud
Rotations90 [deg]

Library information

Here an overview of the parts library:

Wenebrik: LeoCAD library

Still missing the 2 chimney parts (#19)…

Building in LeoCAD

To be ounest, I did not enjoy building the real model. I could have done a better job, by aligning the parts better, but it still a challenge. Building with LeoCAD was about the same experience. So in a sence, a good copy of the real building.