Released in the 1958, Jaeger-LeCoultre's Geophysic Chronometer wristwatch commemorated the International Geophysical Year, which coincided with the brand’s 125th anniversary. The International Geophysical Year was a global initiative involving 67 countries conducting comprehensive studies of geophysical phenomena across the planet including seismology, electromagnetism, glaciology, radioactivity, and solar activity. The mid-20th century was a period of extensive scientific study with the launch of the first satellites like Sputnik 1 and the start of the space age, the advancement of nuclear power, as well as the establishment of the first Antarctic research station. During this period of intense scientific research, the world of horology also underwent a sea change with the production of tool watches that fit the needs of new age explorers.

Jaeger LeCoultre’s Geophysic Chronometer wristwatch was produced for one year with what is believed to be between 1000 to 1300 examples produced. The 35mm diameter stainless steel case was designed for scientists and explorers who would be in extreme conditions, highly water resistant with an inner iron case to protect against magnetism. The present example is exceptionally well-preserved and retains the original Chronometre Geophysic sticker to the back. The watch is a testament to both the ingenuity of exacting chronometer craftsmanship and the spirit of scientific excellence of the mid 20th century.