Sorry to be the bearer of bad news but this vase is certainly nothing to do with Daum. The vase is Czech, a 1980s or newer issue of an older design (either Schlevogt or Halama, I forget who did the original but it shouldn't be hard to find). About 10-20 years ago there was a rash of these coming on to the market with fake 'R. Lalique' marks. It looks like the forgers have diversified now -- quite possibly because people got wise to the Lalique scam...