“The world’s first and finest plastic (building) construction toy.”

Invented by C.B. Plimpton and patented in 1933. Bayko is manufactured by Plimpton Engineering Company Ltd, between 1934-1958. Bayko is taken over by Meccano between 1959-1960s.


Many informative sources:

Active facebook group,
BaykoMan, Melright, MeccanoIndex-Bayko,
Bayko Collectors clubs, Brighton Toy Museum

Copyrights…

The Bayko name and logo are the Registered Trade Mark and are the Copyright of ‘Transport of Delight’.


Patented

GB422645, application date: Nov. 1933:

GB613767, application date: July 1946:

With the 1946 patent, gable constructions are added.


Bayko series

Year:Series:Sets:Material walls:
1934-1936First production#1-5 &
#1A-4A
Bakelite (Phenol Formaldehyde)
1935Ornamental additions
De-Luxe set
A, B C

#6
Bakelite
1937/
1938
Colour Change
De-Luxe set (recolored)
‘Special sets’
All sets
#6

#20-22A,23
Bakelite (Urea Formaldehyde)
1939-1941‘New Series’#1-6 &
#1C-#5C
Bakelite
1945/1946Post-War ‘New Series’#0-3 &
#0X-2X
Bakelite
1949-1959Post War Plimpton
The Peak Period
Including:
#3X & #4
PolyStyrene
(Styron 475)
1959-1960sMECCANO Takeover#0-3, #11-15Re-tooled.
PolyStyrene
Short version of: BaykoMan – Plimpton Era Summary

Bayko Sets

Image courtesy: BaykoMan

Box & Content: ‘Post War Plimpton’


Manuals

For good quality manuals, go to: Meccano Index – Bayko
If you have more proper scanned manuals, I’m happy to share them too.


Parts

Parts & colors produced, during the years:

Image courtesy: BaykoMan – Malcolm Hanson’s display board

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:
BasesBakelite / PolyStyrene
Hole spacing: 3/8 [inch] / 9.525 [mm]
Single color pieces
RodsSteel
Diameter: 75 [thou] / 1.905 [mm]
Single color pieces
WallsBakelite / PolyStyrene
¾ x ¾ x 3/8 [inch]
19.05 x 19.05 x 4.7625 [mm]
Single color pieces
Bay size3/8″ (9.525 mm)Scalled: 10 [mm]
LeoCAD settings:
Draw line every X studs
Snap XY5 [mm] 1/4 stud
Snap Z1 [mm] 1/20 stud
Rotations30/45/90 [deg]

Library information

Here an overview of the parts library:

LeoCAD numbering system

Some parts need to be added together (Dormer roof, Double opening door, etc). So the specific parts could have different colors.

In total: 101 unique parts. Variations of gable & roof styles are not included.

Part numbering/identification

For playing virtual, it’s more handy to re-arrange parts. Re-using the number system concept from L’Edifice, enables a more logic way to build virtual.

Coloring

Since Bayko using a lot of colors for the same parts, these library parts are created w/o any special color. This enables the modeler creating his own color pallete.

Corner parts…

In LeoCAD it’s possible to rotate parts, but when adding a next item on top, the next part will use the same orientation and ends up bellow the previous part. That’s why corner parts having a left and a right version:

Some Bayko parts, having left & right in LeoCAD.

Building in LeoCAD

LeoCAD building animation

This is actually a nice toy to play with, both in real & virtual. I’m also surprised by the various building possibilities, also found on FB. There are still enthousiasts printing there own unique DIY parts! 🙂
For game play, it’s very simular to the French wooden Bâtiss.