Dirk:
Yes, it does have an Art Deco look. The vase is pictured on p. 229 of Helmut Ricke 'Glass Art,' where it is described as "smoky brown glass, mold-blown. Base and rim ground. Decoration in polished miter cut: six stylized sea gulls above double wavy line." It was made by Glashütte Richard Süssmuth. I'm not a big Art Deco collector, but I like this piece and so have been looking for more Süssmuth, without much luck. So thanks for the original post. I've taken a quick and dirty picture of the piece, which I'll attach FYI.
David