Cubist vase by Hem

Excellent condition glass vase by Hem.
Signed.
Cubist pattern.
These vases are still a mystery; Rather hard to find, and almost only in France and in Belgium, they are sometimes marked "Czechoslovakia"
It is likely that these vases were made in Czechoslovakia, imported in France or Belgium without any pattern and then worked on by Hem artist for sceneries.

About 25cm high (10")