Jaeger-LeCoultre · Geophysic

Strap for Geophysic True Second Stainless Steel / Silver / Bracelet

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

20mm

20 mm straps All Jaeger-LeCoultre

Lug width20 mm

Case diameter39 mm

Reference8018120 (aka: Q8018120)

FamilyGeophysic

MovementJaeger-LeCoultre caliber 770 Hours, Jumping Seconds | Date

CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

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Straps for the Geophysic 8018120 (aka: Q8018120)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Geophysic 8018120 (aka: Q8018120), seen from the bench

The Jaeger-LeCoultre Geophysic 8018120 (Q8018120) stems from the International Geophysical Year 1958, when Le Sentier developed a watch able to withstand extreme magnetic fields up to 1,000 gauss through ferromagnetic shielding. The modern reissue maintains the round case with smooth bezel, pronounced lugs, and integrated bracelet design. Powered by the Jaeger-LeCoultre caliber 770 with jumping seconds and date, the stainless steel case measures 39.00 mm in diameter. Lug width is 20 mm, compatible with standard aftermarket straps without compromising visual proportions.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only