My machine only gets a bad picture from your posting -probably my fault
but its good enough to see it is indeed a Sauge, designed 1923 produced until 1947.
I can't quite get the colour, but Rene Lalique did so many differebt Blues -some have names -electric blue, teale etc, but many don't - so people seem to invent there own names for them (mighnight blue, boromee blue etc).
There have been quite a few fake Blue Rene lalique vases coming out of South America recently -but I don't think Sauge is one of them
(and they don't usually have France in script)
A very nice vase if its perfect!