Art Deco Czech Brass Filigree Ruby Red Crystal Choker Necklace

Incredible Art Deco Czechoslovakian gilded brass filigree choker necklace.  Large 40mm x 30mm gold brass filigree pendant with a bezel set ruby red faceted Czech crystal with two O rings connecting to a unique brass chain.  Chain has 3 small O links alternating with longer rectangle links.  At 2” from the pendant there are sparkling round and bicone crystals strung on a wire, connecting to the rest of the chain.  Spring ring closure that has a hallmark on it, but has been rubbed down and worn off to the point it’s not readable.  But I believe it says Czechoslovakia or W.Germany. 

Measures: 16” long total.