Pair of Secessionist Vases, ca. 1915, possibly Wiener Werkstätte, Glasfachschule Haida or Steinschönau

I recently acquired this amazing pair of vases in a trade with a friend, and I must say I'm grateful to have them. It's too bad that they bear no mark or signature, because whoever did them deserves some credit. These thick-walled concave cylindrical vases are hand painted in black, green, red and yellow enamels in a motif commonly used by Josef Hoffmann at the Wiener Werkstätte, namely, chordated leaves with alternating bell flowers and scrolling vines. Each one has three such panels alternating with panels of vertical stripes and dots. The bottoms are ground flat and polished. If Professor Hoffmann did not design them (I am still researching this), then I think it's safe to say that whoever did was certainly heavily influenced by his work at the Wiener Werkstätte. I am leaving them unattributed for now, until I can do more studying. If anyone has any other ideas, I would be grateful for the input. Alternately, they could be from one of the two major glass refining schools in Bohemia - Haida or Steinschönau. The details are as good as any I have seen.