1960s set of 3 urchin-like ceramic vases

A charming artisan set of three ceramic urchin-like decorative vases/spheres from the 1960s, France. Note detailed photos for interesting techniques applied to create grey and white stripe design with a brilliant, subtle sheen.

There is a tiny circular opening at the top of the vases. The three vary in size creating an eye-pleasing, odd number trio. Lovely pieces to decorate a coffee table or shelf, or to inspire a geometric painting. Signed but artist unknown.