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Modelit(a) Construction Sets
and
Modelit(b) Construction Sets

Modelit(a) metal construction sets were similar to Meccano. It was manufactured in the USA. Thought to date from the late 1910s to around 1920.

This was followed in the early 1920s by a significantly different Modelit(b) which had alternate round and square holes.

Modelit(a)


Manufacturer / Distributor

The Watrous Manufacturing. Co., East Hampton, Connecticut, USA


Info from the Metal Constructional Systems Database for MODELIT [a]

Maker
 
System Type
Very like Meccano
Country
USA
Dates
late 1910 (see comment *1) to early 1920s
Material
Steel
Thread
8-32
Boss Type
single-tapped
Boss Thread
6-32
Diametrical Pitch of Gears
38
No. of Parts in System
64
Hole Pitch (Spacing) (mm)
12.7
Diameter of holes in Strips(mm)
4.4 (see comment *2)
Diameter of the Bore in Bosses(mm)
4.2
Diameter of Axle Rods(mm)
4.0
Types of Nuts and Bolts
Nuts: square
Bolts: round (slotted)
Material/Finish of Nuts and Bolts
Steel with a Nickel plated finish
Size of the Nuts across Flats (mm)
7.2
Bolt diameter (mm)
7.5

Comments
Lid label has boy with black bow tie looking at a Suspension Bridge. Numbered sets. Perforated Plates & Angle Girders instead of Flanged Plates. *1 1916 has been suggested. *2 Some 4.1-4.2 in Plates & Strips.

The MCS document for this system is shown below. It can also be downloaded to your computer if desired here

NOTE : If the MCS document does not appear in the window below, then refresh the page.

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


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


The Modelit(a) instruction manual - unfortunately the cover is missing.

Modelit(b)


Manufacturer / Distributor

The Watrous Manufacturing. Co., East Hampton, Connecticut, USA


Info from the Metal Constructional Systems Database for MODELIT [b]

Maker
 
System Type
Hole pitch <12.7mm
Country
USA
Dates
1920s (some significant doubt)
Material
Steel
Thread
8-32
Boss Type
single-tapped
Boss Thread
6-32
Diametrical Pitch of Gears
38
No. of Parts in System
59
Hole Pitch (Spacing) (mm)
11.7 (see comment *1)
Diameter of holes in Strips(mm)
4.5
Diameter of the Bore in Bosses(mm)
4.2 (see comment *2)
Diameter of Axle Rods(mm)
4.0
Types of Nuts and Bolts
Nuts: square
Bolts: round (slotted)
Material/Finish of Nuts and Bolts
Steel with a Nickel plated finish
Size of the Nuts across Flats (mm)
7.3
Bolt diameter (mm)
7.5

Comments
Lid label as above but model is Derrick Crane and sets are lettered instead of numbered. Alternate round and square holes. *1 7/16" exactly. *2 4.1 also reported.

The MCS document for this system is shown below. It can also be downloaded to your computer if desired here

NOTE : If the MCS document does not appear in the window below, then refresh the page.

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


There are currently no manuals, leaflets or photos etc. of Modelit(b) available for downloading. If you can supply any, please get in contact with me.