An unusual mid 19th century fob watch by LeRoy et Fils

An unusual mid 19th century fob watch by LeRoy et Fils, the signed white enamel dial with gold Roman numerals and outer Arabic numerals minutes ring, rose-cut diamond bezel and suspension loop, the entire body formed from a circular cabochon garnet, 2.8cm wide, suspended from a chatelaine-style gold and silver brooch pendant formed with three hinged graduated sections, set overall with rose-cut diamonds and a mid-section garnet cabochon incorporating a hinged suspension pin, maker's lozenge JAM with dolphin and stars to reverse, 12cm high, fitted case by A.M.LeRoy et Fils

Provenance: property of the family Zhivago, and thence by decent to the current owner