Here is a rare find which we attribute to the Jakob Bengel Company, circa 1930s.
Necklace measures 16" not including fastener.
Back of necklace, near the clasp, is marked GERMANY.
The chain is constructed of chrome plated brass. The center decoration is 3 half round pieces of brown plastic which DO NOT TEST POSITIVE for Bakelite. It is some other type of early plastic. The center area measures 1.5" by 1.5".
There is some normal wear, and a bit of chrome loss on the back.
A very similar necklace is pictured on page 198 of the book Art Deco Schmuck: Jakob Bengel - Idar-Oberstein / Germany.