1907 Yusupov Egg
(also known as Sandoz Youssoupov Egg and Yussupov Egg)*
Presented
by Prince Felix Yusupov to his wife Zinaïda
on the occasion of their 25th wedding anniversary
Made in Saint Petersburg
Owner: Fondation Edouard et Maurice Sandoz, Lausanne, Switzerland
Height: 27 cm
The Yusupov Egg is made of yellow and red gold, rose-cut diamonds, emeralds, pearls, rubies, white onyx, translucent raspberry pink and opaque white enamel.
The Egg is made as a Louis XVI style table-clock, the revolving opaque white enamel dial, set with diamond-set Roman numerals, standing on three pilasters and lion-paw feet. Suspended laurel swags contain three oval medallions that once held miniatures of Prince Felix Yusupov and this sons, Felix and Nicholas. The medallions now have the gold letters M, Y and S, within rose-cut diamond borders, the initials of the last owner, Maurice Sandoz.
Background information
This Egg was presented by Prince Felix (or Feliks) Yusupov to his wife Zinaïda on the occasion of their 25th wedding anniversary. Prince Felix Elston-Soumarkov (or Soumarkov/Sumarrokow-Elston) was granted special dispensation by the tsar to take the name Yusupov when he married the Princess Zinaïda Yusupov. The name of one of Russia's 
oldest and wealthiest families would otherwise have died out.
It was the son, the young Prince Felix, and a group of conspirators, who on December 16, 1916, in what was then considered to be a patriotic act, murdered Grigori Rasputin the monk who played a key role in the downfall of the Romanov imperial dynasty. They succeeded in luring him to Felix' home, the Moika Palace, where Yusupov fed him Madeira tea laced with cyanide and cakes. When the poison had no effect, a panicked Yusupov shot him several times, before his co-conspirators dumped Rasputin into the Neva river to drown. Rasputin had prophecied the decline and fall of the Romanov empire if he was assassinated. Only ten weeks after Rasputin's death, the Romanov's were overthrown by Bolshevik revolutionary forces!
As the october Revolution of 1917 approached, the family had secret rooms built to safeguard their vast amount of treasures. It took the Bolsheviks five years to discover five secret rooms in the Moika Palace! It is said that two rooms may still remain undetected!
The miniatures of Prince Felix and his two sons were removed in New York at the request of Maurice Sandoz, the new owner. The firm that did the work reportedly retains the original medallions to this day.
1907 Presented by Prince Felix Yusupov to his wife Zinaida. Probably sold by Russian officials in Paris or Berlin. 1949 Owned by dealers in London. 1953 Owned by Dr. Maurice Sandoz, Switzerland. June 1958 Collection of the late Maurice Sandoz. 1977 Collection of Edouard and Maurice Sandoz. 1995 Fondation Edouard et Maurice Sandoz, Lausanne, Switzerland. Black and white picture, the Yusupov Egg as it was in 1907.
The capital letter "Y" on one of the oval medallions! This picture was the very first one I got of the Yusupov Egg, I was so happy to get it as one of my last missing pictures! Thank you so much "Laurent"! Volker, thanks for the big colored picture!
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October 2009. After seeing the monogram of Princes Yusupov on a beautiful fan of hers in the Amsterdam Hermitage, I suddenly recognized it on the key of the Egg!
The key of the egg is made of red and yellow gold and shows in an oval, adorned with swags and topped with the imperial crown, in cyrillic characters the monogram of Zinaïda Yusupova Sumarkov Elston, СЗЮЭ. (Зинаида Юсупова Сумароков Эльстон).
For a discussion on the original miniatures of this Egg, see Forum Discussion Individual Eggs.
*note: the name Юсупов (Yusupov) is spelled in many different ways due to translation from Russian. I found it written: Iusupov,
Joesoepow, Joesopov, Jussupoff, Jussupov,
Jussupow, Jusupov, Jusupow, Yossopov,
Yousoupoff,
Yousoupov,
Youssoupov,
Youssoupoff, Yusopov,
Yussupov and Yusupov 
This Egg is one of the "Clock Eggs". Here you can see them all together
page updated: October 15, 2009