thanks Marc - couldn't you just die for some of that 1930s French opalescent stuff - in fact I wasn't aware of that site.
Art deco is a style - not necessary that the glass itself was made between the two world wars - it's all apparently to do with the type of design, though of course something made in 1930 is preferable to something made last year. Does your vase do it for me?? - sure, it's geometric, but for me it lacks that sharp avant garde something that makes you take a second look. Perhaps it's a tad unadventurous

Apologies for the personal input - glass is all things to all people. Fingers crossed that you find an id.