Jaeger-LeCoultre · Master Ultra Thin

Strap for Master Ultra Thin Squelette Red Gold

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

Lug width20 mm
Case diameter38 mm
Reference13425SQ (aka: Q13425SQ)
FamilyMaster Ultra Thin
MovementJaeger-LeCoultre caliber 849A SQ hours, minutes
Year2015
CaseRose Gold

Spring bar

Swiss Standard universal spring bars

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

Straps for the Master Ultra Thin 13425SQ (aka: Q13425SQ)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Master Ultra Thin 13425SQ (aka: Q13425SQ), seen from the bench

The Jaeger-LeCoultre Master Ultra Thin ref. 13425SQ is a Swiss ultra-thin timepiece featuring a red gold case of 38.00 mm diameter and the caliber 849A SQ movement with hours and minutes only. The watch strap has a lug width of 20 mm. Born in the Vallée de Joux, this model embodies refined classical elegance through architectural purity and minimalist design, avoiding unnecessary complications to achieve perfection in every component.

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