DESIGNED BY JOSEF HOFFMANN, MADE BY WIENER KERAMIK FOR THE WIENER WERKSTÄTTE, 1920S

cf. Waltraud Neuwirth. Wiener Keramik, p. 442, sequential reference numbers 5, 7, 10, 11, 13, 15, 17 for works by Hoffmann recorded. The assumption may be made that the present vase numbered "6" forms part of this sequence.
See also: Josef Hoffmann. Architect and Designer 1870 - 1956, Galerie Metropole exhibition catalogue, p. 166.