Although it is unknown what the production span of this "platform" was exactly, these were made before 1964 as they are marked "Made in U.S.-Zone Germany".
Most probably made between 1954 and 1964.
These plastic tracks were used to, amongst others, create loops in a Varianto track (similar to the drawing below, taken from a vintage Varianto catalog).
We have a number of these platforms available, all in mint condition.
A great addition to any Schuco Varianto collection!