JAKOB BENGEL Attrib.
Art Deco Necklace
Chromium plated brass Galalith
H: 3.1 cm (1.22 in)  W: 6.5 cm (2.56 in)  L: 47 cm (18.5 in) 
German, c.1930
Literature: cf. Art Deco Schmuck Jakob Bengel
Christianne Weber, 2002.
Zeitgeist, 100 Jahre Modeschmuck aus Idar-Oberstein,
A Century of Idar-Oberstein Costume Jewelry, Wilhelm Lindemann (Ed), Anne-Barbara Knerr, 2009, Arnoldsche, ISBN 978-3-89790-314-2; p.10.

Ref: 7543