Jaeger-LeCoultre · Master Ultra Thin

Strap for Master Ultra Thin Moon 36 Stainless Steel / Silver / Alligator

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

Lug width20 mm
Case diameter36 mm
Reference124842J (aka: Q124842J)
FamilyMaster Ultra Thin
MovementJaeger-LeCoultre caliber 925AA Hours, Minutes, Seconds | Moonphase
CaseStainless Steel

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 124842J (aka: Q124842J)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Master Ultra Thin 124842J (aka: Q124842J), seen from the bench

The Master Ultra Thin is a three-hand watch by Jaeger-LeCoultre that integrates the moon phase complication. It is powered by the in-house caliber 925AA which provides hours, minutes, seconds and moon phase indication. The Q124842J reference features the thin construction characteristic of the Master Ultra Thin collection.

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