"Art Deco Belt"
This very original belt from the Art Deco period is composed of a double chaining, the hallmark of which may indicate silver with medallions in galalith, a material used as a substitute for ivory, made from casein.<br />
Hard and silky, galalith is non-flammable and is worked by hand, as seen on these finely chiseled medallions.<br />
The Auguste Bonaz establishments in Oyonnax in France and Jakob Bengel in Germany were the two major users of this material to make magnificent and typical Art Deco jewellery.<br />
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<em>source: Wikipedia</em> 
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