Geophysic

The 1958 Geophysic ChronometerChronometerA watch or movement certified for timekeeping precision under a defined testing standard. The applicable certification depends on its maker and period; it is not the same as a chronograph., made for JLC’s 125th anniversary and the International Geophysical Year: antimagnetic to 600 gauss, chronometerChronometerA watch or movement certified for timekeeping precision under a defined testing standard. The applicable certification depends on its maker and period; it is not the same as a chronograph.-grade and built for explorers. Produced for about a year before the automaticAutomaticA mechanical movement wound by a rotor as the watch moves on the wrist. Geomatic replaced it.