70s stackable space age table set

Space age table set

This set consists of 3 tables that are stackable.
They are made of lightweight plastic, probably in the 1970s.
Good condition, only the usual damage but no cracks.
One of the three tables has a slightly different color strip on the side.

Measurements :
Total height - 77 cm. / 30.3 inch.
Height - 26 cm. / 10.2 inch.
Diameter - 35 cm. / 13.8 inch.