The transparent egg is composed of rock crystal and gilt silver wire, and is quite simple in style. The genius of the egg lay in its surprise. The egg is held together by a clasp at the top, and when opened, falls into two halves, each with a rococo style mount.
Surprise
Inside the egg sits a small 110 millimetres (4.3 in) long mechanical gold and enameled peacock in the branches of an engraved gold tree with flowers made of enamel and precious stones. The peacock can be lifted from within the tree and wound up. Placed on a flat surface, it struts around, moving its head and spreads and closes his enamel tail.[1]
Semion Lvovich Dorofeiev, a Fabergé workmaster, reportedly worked on the peacock and its prototypes for three years.[1] It has been suggested that the automaton's inner workings are based on those of a walking peacock by Roullet et Decamps, a reputed Parisian maker specialised in the making of automaton animals.[2]
In 1927, the Peacock egg was sold with nine other Imperial eggs by the Antikvariat to Emanuel Snowman of Wartski in London. Bought by a Mr. Hirst in 1935, it was sold to Dr. Maurice Sandoz of Switzerland in 1949 and donated in 1955 to his Fondation Edouard et Maurice Sandoz (FEMS) in Lausanne, Switzerland. Since its purchase by Sandoz, it has only been seen publicly six times, the last time in 2009.[3]