Josephine Glassworks Cut Indigo Crystal Vase w/Silver Decoration, Sigfried Haertel design, PN 1727, ca. 1942

This form is documented in the Josephinenhütte Master Book, ca. 1942, as a design of Sigfried Haertel (1870-1943). Professor Haertel was a painter who exhibited a preference for cubist, geometric forms, surface cutting, and sparse painting. From 1921 forward, the Josephine Glassworks relied heavily on surface cutting. The color is really striking in person - it is indigo colored lead crystal, mold blown, cut with 8 broad facets on the top half, 16 on the lower. A stylized silver galvanized decoration is applied that is (to me) in some ways reminiscent of the floral patterns of the Vienna Werkstätte, which was an early influence of Professors Pfohl and Haertel.

source - Josephine Glassworks - Art Nouveau - Art Déco - Modern 1900-1950, by Stefania Zelasko, published by the Glasmuseum Passau