Watches with the movement entirely made of bone are very rare, most of them were apparently made at the same period somewhere in central Europe, but usually they are not signed. Among the few known to exist, two were sold by Antiquorum, one of them in Hong Kong on June 4th 1996, lot No. 414, the other, sold on April 21st 1996, was certainly made to be presented to the Empress Josephine, Napoleon's wife, the cock pierced and engraved with her coat-ot-arms, both cases were very similar to that of the watch now offered for sale and one might think the three of them were produced in the same place if not in the same workshop. The watch, recently discovered, which is signed, gives for the first time an information on the area where such watches were produced. In the second half of the 19th century, few watches, the movement also made of bone, were also produced in Russia, of the type made of boxwood by Bronikoff; a good example being in the collection of Das Museum der Zeitnessung, Beyer, in Zurich.