French work of the 1910s - Lot 31

French work of the 1910s Choker necklace convertible into two bracelets and a tiara in 950‰ platinum entirely set with old-cut diamonds and cut into crowned roses. One part with articulated openwork ribbon links in falls, forming a bracelet and able to be worn as a tiara, the other part with fine tapered oblong links forming the second bracelet. Ratchet and eight safety clasps. Diamond workshop hallmark. Weight of the two main diamonds: approx. 0.70 and 0.50 carat. Necklace length: 34.5cm. Bracelet lengths: 18 and 16.5cm. Mesh width: 1cm. P. Gross weight: 21.7g. With burgundy morocco case signed "H. Artéon Bayonne", enclosing its blackened metal tiara transformation system. (Deformations and soldering to the system, a few chips).