Princess Marthe Bibesco's Emerald Bandeau

Creation:  This tiara was made by Cartier in the early 1920s from an existing tiara and can be worn as a necklace.

Materials:  emeralds and diamonds

Provenance:

1. Princess Marthe Bibesco
2. Unknown Owner; bought at auction at Christie's in 1970

Princess Marthe

Princess Marthe

Questions:

• Does this tiara still exist intact?