Jaeger-LeCoultre · Geophysic

Strap for Jaeger-LeCoultre Geophysic 8108420

The Geophysic Universal Time Stainless Steel takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

  • 4.8 out of 5 · 269 reviews
  • Ships in 1–3 working days
  • Worldwide shipping
  • 30-day returns
  • 12-month warranty on manufacturing defects
  • Hand-stitched in Milan
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Lug width21 mm
Case diameter42 mm
Reference8108420 (aka: Q8108420)
FamilyGeophysic
MovementJaeger-LeCoultre caliber 772 Hours, Jumping seconds, World time
Year2015/9/30
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

Standard spring bar · length 21 mm · Ø 1.8 mm double flange · industry standard, no brand part number

Geophysic Universal Time Stainless Steel — watch

Your watch with our straps

Geophysic 8108420 with Grand Cavalier Leather Strap Orange
Geophysic 8108420 with Brown Italian Leather Strap
Geophysic 8108420 with Black Saffiano Strap Ecru Stitching

Calf, Orange

Grand Cavalier Leather Strap Orange

€120

★ 4.9 · 12

1 / 43

Real photos of the strap and the case. No generated images.

What length do I need?

Measure your wrist with a tailor's tape or a piece of string, comfortably snug.

Wrist circumferenceLength (long side / short side)
15.0–16.4 cm120 / 70 mm
16.5–17.8 cm125 / 75 mm
17.9–19.0 cm130 / 80 mm
19.1–20.3 cm135 / 85 mm
20.4–21.6 cm140 / 85 mm
21.7–22.9 cm145 / 90 mm

The ready-to-wear strap is 115 × 75 mm. For a smaller or larger wrist I make it in the right length: order your length.

What I'm asked about the Jaeger-LeCoultre Geophysic 8108420

What strap size does the Jaeger-LeCoultre Geophysic 8108420 take?

The Jaeger-LeCoultre Geophysic 8108420 needs 21 mm between the lugs, usually 18 mm at the buckle. It's the size I've been fitting on it for years.

Can the strap on the Jaeger-LeCoultre Geophysic 8108420 be changed?

Yes. It has spring bars between the lugs: with the right tool the strap comes off in a minute. If you'd rather not risk a scratch, I do it in the workshop.

Can I put a leather strap on the Jaeger-LeCoultre Geophysic 8108420?

Yes, in 21 mm leather. On a 42 mm case a calf strap works every day; if you want something more, alligator.

Which strap do you recommend for the Jaeger-LeCoultre Geophysic 8108420?

A 21 mm calf strap, for every day. You'll find it ready in the 21 mm collection. If you'd rather have something built on your wrist, the Casati atelier.

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

The atelier's website: casatimilano.com

Updated on · by Antonio Zichichi