A French silver pocket sundial, Octagonal, inset with compass, engraved with four hour scales for latitudes 52, 49, 46 and 43, with a folding bird gnomon engraved for latitudes , the reverse engraved with the latitudes of French cities and The Hague, Brussels, London, Madrid, Rome and Vienna. Signed Butterfield Paris, beginning of 18th century. Size ca 5,5 x 4,5 cm,