Ca. Ø67.5mm, ca. 250g, silver case, case and movement with matching number, extremely rare chronometer calibre, numbered 2 times as prescribed for deck chronometers, screwed gold chatons, fine adjusting device, Guillaume chronometer balance, lever escapement, original silvered dial with 50-h power reserve indicator, blued steel hands, in very good condition, in working order. The deck chronometer was tested at the Neuchâtel Observatory in 1908 and in Parisi in 1910, Observatoire du Parc de Montsouris Astronomie.