The dial is composed of applied gilt roman numerals, gilt arrow hands, bell striking Pons movement with silk suspension, the arched case with acanthus moulding. The mine where this orbicular diorite is mined is situated near Olmeto in Corsica which was discovered in 1785 and was mined from the beginning of the 19th century. It was also known as Napoleonite or Corsite after Corsica where it was mined.
Literature-+
Gerard Hubert and Nicole Hubert, Musee national des Chde Malmaison et de Bois Preau, Paris, 1986, p. 72 and p. 74, for a pair of vases in the Bedroom of Napoleon, in orbicular diorite (formerly in the Chde Malmaison).