At the time it was probably seen as acceptable to breed a cat that could inherit substantial health problems. In the modern world it is not and I suspect that legislation was introduced in Germany after creating the cat, which effectively stopped the cat breed progressing to cat association registration. The GCCF does not recognise the Scottish Fold to this day, a much better known breed.
As the picture shows, the coat is dense. The cat is, in effect, a bigger and more densely coated Devon Rex with folded ears. This cat breed is a more solid and cobbier cat than the Devon Rex incorporating as it does European Shorthair and Scottish Fold conformation.

From Poodle Cat to Domestic Cat Breeds
Photo: I have taken the liberty of using a photo from this website: http://catouweb.free.fr. It looks genuine and I have provided a link to the site in return. I don't know the author of the photo.