Jaeger-LeCoultre Chronomètre Geophysic

About this reference

The Jaeger-LeCoultre Chronomètre Geophysic E168 was produced in 1958 to commemorate the International Geophysical Year and the brand’s 125th anniversary. Collectors value this reference for its chronometer-certified Calibre 478BWSbr movement, which features a hacking seconds mechanism, a Glucydur balance, and a swan-neck regulator. The 35mm stainless steel case includes an inner soft-iron cage for anti-magnetic protection up to 600 gauss. Production was limited, with approximately 1,038 steel units manufactured. The dial typically features luminous plots on the inner bezel or "crosshair" markings, though variations exist. On the secondary market, these watches generally trade in the $20,000 to $40,000 range depending on condition and dial configuration. A notable variant is the "Publicité" dial, which lacks the Geophysic branding, while a well-preserved example reached approximately $67,000 at a 2017 Phillips auction, reflecting the premium placed on original luminous material.