I wonder, since there is an abundance of vases with this label, if they might have been sold as souvenirs at the Brussels World Fair 1958. Or maybe someone could win a vase as grand prize for playing some sort of game. I looked online and saw some of the old exhibits at the fair. The thing about the vases being award winners is that the execution does not seem all that great to me, and there are so many of them. I saw some blogs attributing them to Poli, but I don't get a Poli feel for the things I've seen. Poli had crisper lines and colors.