The Bayel sticker is interesting. The usual attribution for these is D'Avesn for Daum, however, the original source for that attribution appears to have been Cappa. Cappa does have some known misattributions (Walther & Barolac both attributed to Sevres, Verlux attributed to Sabino, etc.), so I wonder if the Daum attribution can still be trusted?
I've owned several of these vases over the years but the only mark I've seen was a faint, acid etched, 'Made in France' to the base of one example...