 The watch was fitted with the Jaeger-LeCoultre Calibre 478BWS and featured seventeen jewels, a Breguet overcoil, a regulating spring on the balance-cock, a shock-absorber and a Glucydur balance.The year of its release, the Geophysic was offered to William R. Anderson, the captain of the Nautilus, the first American nuclear submarine to travel between the Pacific and Atlantic oceans via the North Pole.JLC produces some complicated watches (Grand complication), e.g.