Jaeger-LeCoultre · Geophysic
Strap for Geophysic Universal Time Stainless Steel
Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
20mm
Lug width20 mm
Case diameter42 mm
Reference8108420 (aka: Q8108420)
FamilyGeophysic
MovementJaeger-LeCoultre caliber 772
Hours, Jumping Seconds, World Time
CaseStainless Steel
Straps for the Geophysic 8108420 (aka: Q8108420)
Selected for the 20 mm lug width · workshop selection
Black Alligator Strap with Light Blue Edges€210
Black Alligator Strap with White Edges€210
Millenium Cognac Alligator Strap€270
Matte Blue Alligator Strap€270
Green Rubberized Alligator Strap with Ecru Tribal Stitching€185
The Geophysic 8108420 (aka: Q8108420), seen from the bench
The Jaeger-LeCoultre Geophysic 8108420 (Q8108420) is a stainless steel sports watch with a 41.6mm case and 20mm lug width. It features the JLC caliber 772 movement, integrating hours, jumping seconds, and 24-hour world time functionality in a single reading. The antimagnetic protection derives from the original 1958 Geophysic design, created for polar expeditions and scientific missions in extreme conditions.
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.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only