These were supplied by the West German firm of Pola but only appeared in a couple of catalogues between 1965 - 1967 and in the second track plans book (1965). After 1967 they were superseded by Jouef's own range, although Pola went on to make a vast range of excellent kits.
Here is a rare picture of a Pola kit in a Jouef box. They were sold in picture boxes like this but also in plain boxes as the railway items were.
Click on the picture for a bigger image
Here is another rare picture of Pola kits in Jouef boxes.- the coaling stage, the goods shed and the house & barn plus the diagram from the florists and its plain box lid alongside.
There are some good photos here.
Below is a table of the Pola-manufactured models sold by Jouef up to 1968