Chapter IV of Vincent Meylan's book is dedicated to Isabella II of Spain and the Spanish period of Mellerio, when they relocated to Madrid because of the French Revolution of 1848.
Also this necklace of Queen Sofia is included: diamonds, black and grey pearls. Bought by Queen Maria Cristina of Spain at Mellerio, it was sold in 1988 - in a 'Mellerio Madrid' box - at an auction in Geneva. Apparently the Spanish King bought this necklace, and that's why we can still see it today. The book contains a wonderful close up.