Princess Andrée Aga Khan's Lotus Halo Tiara

Creation:  This tiara was made by Cartier in 1934.  The lower zig-zag portion may be removed and worn as a bandeau.

Materials: diamonds set in platinum

Provenance: 

1. Princess Andrée Aga Khan née Andrée Joséphine Carron
2. Prince Sadruddin Aga Khan; inherited from his mother in 1976
3. unknown owner; sold at Christie's in 1988 with the proceeds going to the Bellerive Foundation

Princess Andrée

Questions:

• Who currently owns this tiara?