MAK WW archive, Glass Inventory No. 3311, Model. No. va 35. Approximately 400 copies of this design in various versions and colors were made. An example of the present model in purple was featured in the Wiener Werkstätte 25th anniversary souvenir publication.
cf. W. Neuwirth, Wiener Werkstätte: Avantgarde, Art Deco, Industrial Design, 1984, pp. 196-7, no. 154.