45. 45Ω Jaeger-LeCoultre. A 9K gold manual wind wristwatch Model: Chronometre Geophysic Reference: E168 Date: London Hallmark for 1959 Movement: 17-jewel LeCoultre & Co. Cal.P478/BWSbr manual wind, adjusted to 5 positions and temperatures, No.1331071 Dial: White, applied gilt baton hour markers, Arabic 6 and 12, black outer minute divisions, polished sword hands with luminous inserts, centre seconds Case: Polished tonneau form, screw down back, No.155 Strap/Bracelet: Green faux shark leather Buckle/Clasp: Gilt buckle Signed: Case, dial & movement Size: 35mm Weight: 44,61g The Geophysic was launched in 1958, on the occasion of the International Geophysical Year. Jaeger-LeCoultre designed it as a scientific and professional timepiece, intended for explorers and researchers. Its hand-wound movement, Cal.P478, is chronometer-certified, ensuring impeccable precision. The watch stood out for its anti-magnetic case, resistant to extreme environments. Its clean dial offered perfect legibility, true to the Manufacture's functional yet elegant style. Produced in stainless steel as well as in gold, it combined robustness with refinement. Over the time, the Geophysic has become an icon of prestigious utilitarian watchmaking.