Description: A rare, fine torpedo boat chronometer of the US Navy from the 1st series with 50h power reserve indicator - with copies of the Bulletin 2me Classe de l'Observatoire Astronomique de Neuchatel, 1908 and of the Bulletin 1ère Classe de l'Observatoire Astronomique de Neuchatel, 1916, regulated by Arnold Vuille-Roulet Case: silver, tiered, polished, military engraving "US Navy", gold crown and hinge. Dial: silvered, Arabic numerals, auxiliary seconds, blued spade hands. Movm.: bridge movement, frosted, gilt, 21 jewels, 8 adj., screwed gold chatons, Guillaume gold screw compensation balance, blued balance spring according to Phillips, index spring fine adjusting device, counterpoised lever.
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