Jacob Bengel chrome and galalith necklace

So here you have some crappy pictures from a nice necklace I have, sorry for that.
Many years ago, I bought this nice necklace at a flea market in Antwerp, a nearby town. I paid 20 euros for it, which was a steal. Right away I saw it was art deco. It was only later I learned its a Jacob Bengel necklace.
Jacob Bengel was a locksmith in Idar Oberstein, Germany. He founded his company in 1873 and originally he made watch chains. During the Art Deco period he started using new materials like galalith and he made experimental jewelry. The pieces, catalogued 1924-1939, combined brass and chrome with geometric shapes of colored galalith.
What I find interesting about my necklace is that you can still see he was used to making watch chains.