Andy, that's the way it is done! Thanks for the picture. Val St Lambert is an option then.
If only I could see how the Sevres vase looks from the base as it otherwise looks so much alike...
And: I'll have to look very close of any mark when I get back home later this week. I think there isn't.

Lustrousstone: thank you for checking !

I think we are closing France then... and I may have to settle with that.
Anyway, I am very happy to be able to put it somewhere in the map and timeline would be around 50- more like 60's I guess.