Longines · Master Collection

Strap for Master Collection Worldtime Pink 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 diameter39 mm
ReferenceL2.631.8.70.3 (aka: L26318703)
FamilyMaster Collection
MovementLongines caliber L635 Hours, Minutes, Seconds, World Time | Date
CasePink 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 Collection L2.631.8.70.3 (aka: L26318703)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Master Collection L2.631.8.70.3 (aka: L26318703), seen from the bench

The Longines Master Collection L2.631.8.70.3 is a 38.50mm 18k rose gold watch with a 20mm lug width, powered by the automatic Longines L635 caliber offering 72 hours of power reserve. This model features a World Time complication with date indicator on a white dial, combining high-frequency travel functionality with refined proportions. The rose gold applied indices and subdials create precise visual hierarchy without excessive ornamentation.

Frequently asked questions

What is the lug width of the Longines Master Collection L2.631.8.70.3?

The lug width of the Longines Master Collection L2.631.8.70.3 is 20 millimetres. This measurement corresponds to the distance between the two pins that secure the strap to the case lugs, measured in millimetres. It is essential to verify this measurement before purchasing a replacement strap to ensure perfect compatibility with the case.

Which strap is recommended for the Longines Master Collection L2.631.8.70.3 in rose gold?

For the Master Collection L2.631.8.70.3 in rose gold, cognac or havana alligator represents the most appropriate choice from both aesthetic and functional perspectives. Shell cordovan, thanks to its ability to develop patina over time, creates a superior chromatic dialogue with rose gold. Calf leather with vegetable tanning offers an elegant and supple alternative, whilst a cotton NATO strap is ideal for those wishing to emphasise the movement's aeronautical heritage.

How do you change the strap on the Longines Master Collection L2.631.8.70.3?

To change the strap, it is necessary to remove the spring bars from the case lugs using a dedicated removal tool or a small hammer and punch. Once the bars are extracted, the strap detaches easily. Installing the new strap follows the reverse procedure: insert the spring bars through the case lugs into the holes of the new strap, ensuring the strap is correctly aligned before fully securing the bars.

Are there aftermarket straps compatible with the Longines Master Collection L2.631.8.70.3?

Yes, high-quality aftermarket straps compatible with the Longines Master Collection L2.631.8.70.3 exist, provided they feature a lug width of 20 millimetres. Specialist suppliers such as milanostraps.it offer straps manufactured in premium leathers including alligator, calf with vegetable tanning, shell cordovan and vulcanised rubber. These straps are customisable in sizing, initials and thread colour selection, guaranteeing functional compatibility and aesthetic coherence with the rose gold case.

What is the lifespan of a leather strap for the Longines Master Collection L2.631.8.70.3?

The lifespan of a leather strap depends on the tanning type and frequency of use. A superior quality alligator or shell cordovan strap can last 4-6 years with ordinary maintenance and regular use. Calf leather with vegetable tanning, more delicate when exposed to moisture, has a lifespan of 3-4 years. Vulcanised rubber demonstrates superior longevity, spanning 6-10 years, due to its inherent resistance to atmospheric agents. Periodic maintenance, including moisture protection and gentle cleaning, significantly extends the useful life of any leather strap.

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