'Other' Construction and Allied Systems Info & Downloads
Alpha(2) Construction Sets
Alpha(2) was a Meccano like construction system with some unusual parts. It was produced in Germany from about 1931-1933.
Info from the Metal Constructional Systems Database for ALPHA 
Hole pitch <12.7mm
1931 to after 1933 (see comment *1)
Steel / Plastic
M4 (see comment *2)
17 (see comment *3)
97 (see comment *4)
12.0 (see comment *5)
Bolts: cheese (slotted)
(see comment *6)
Unusual parts including Bakelite Road/Pulley(s) Wheels, Helical Gear. *1c1970 possible. *25/32 W also reported with brass N&B. *3Mod 1.5, also small-tooth Gears, DP 39e (Mod .65). *4Including 9 for the Kanonen set. *51.5 also reported. *6Round also shown.
The MCS document for this system is shown below. It 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 manuals/leafets and photos which can be downloaded by clicking on the appropriate image.
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