Margot de Taxco sterling silver and black enamel "dots" necklace. This necklace was originally made as approximately a 14 inch choker (the last photograph). The previous owner had a 2 inch extension made for it to make a 16 inch necklace being more wearable for today. The extension simply clips into the original tongue and box clasp and can be unclipped to return it to its original size and does no harm to Margot's original necklace design.
Of course this necklace can still be worn and added to your collection as a 14 inch choker if desired.
The design seems to have an Egyptian design influence and makes a real statement when worn as either 14 inch or 16 inch.
Margot de Taxco Black Enamel with Dots Sterling Silver Necklace