Elegant vintage "Siam" sterling silver bracelet featuring niello enamel work. These bracelets, often referred to as "Siamese" bracelets, depict characters from Thai mythology and were popular from the late 1920s to the 1960s. The black enamel inlay, known as niello, is a mixture of sulfur, copper, silver, and lead, which is used to create contrasting designs on the metal. The bracelet is likely made of sterling silver, which is 92.5% pure silver.