Offered here is an 18K gold and vitreous enamel bangle bracelet from Schlumberger Studios in France made for Tiffany & Co. The bracelet is quite heavy and very well made with a hinge every 1/2 an inch or so. The bracelet will fit a 6.5 inch wrist circumference when closed. This bracelet weighs 127 grams and is 14 mm wide at the widest points.
The color you see is a high temperature firing enamel. The enameling technique was perfected by French artisans hundreds of years ago. This is a very time consuming process. The gold is covered with an enamel in powder form and fired in the kiln at a temperature over 1300 degrees F.
These bracelets were first made in late 1950s and were favorite of Jackie Kennedy and many other high society women.
You can find the information about it’s designer Jean Schlumberger on the Internet. He worked for many years at Tiffany’s designing many beautiful pieces while there. He also maintained a company in France. Bracelets such as this one have sold at various auctions between $20,000 and $30,000.
I was not able to find this exact bracelet in my search of the internet but found one with similar links in this pic. below: