Longines · Master Collection

Strap for Master Collection 38.5 Day Date Stainless Steel / Pink Gold / Pink-Diamond / Bracelet

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
ReferenceL2.755.5.99.7 (aka: L27555997)
FamilyMaster Collection
MovementLongines caliber L636 Hours, Minutes, Seconds | Date, Day
CasePink Gold, Stainless 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 Collection L2.755.5.99.7 (aka: L27555997)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Master Collection L2.755.5.99.7 (aka: L27555997), seen from the bench

The Longines Master Collection features the L636 caliber with indication of hours, minutes, seconds, date and day of the week. The reference L2.755.5.99.7 has 20mm lugs. The movement offers the essential functions for daily use with the traditional reliability of the Swiss brand.

Frequently asked questions

What is the lug width of the Longines Master Collection L2.755.5.99.7?

The lug width of the Longines Master Collection L2.755.5.99.7 is 20 millimetres. This dimension is calculated to ensure correct proportions between the 38.50 mm case, the lugs, and the replacement strap. To verify compatibility, measure the internal space between the case lugs—it must correspond exactly to 20 mm.

What strap material is recommended for the Longines Master Collection L2.755.5.99.7?

For this two-tone rose gold and steel reference, alligator in cognac brown or dark brown tones represents the most elegant choice, amplifying the warmth of rose gold. An excellent alternative is shell cordovan in mahogany red, which develops natural patina over time. Vegetable-tanned leather offers daily versatility, whilst black calf ensures absolute formality.

How do I change the strap on my Longines Master Collection L2.755.5.99.7?

To change the strap, first remove the spring pin from one of the lugs using a dedicated tool or small flathead screwdriver. Gently extract the old strap, align the new one with the lug holes, and reinsert the spring pin until it clicks into place. Always verify that the pin is correctly secured before wearing your watch.

Can I use aftermarket straps compatible with the Longines Master Collection L2.755.5.99.7?

Yes, any strap with a 20 mm lug width is compatible with your watch. Always verify that the width is exact and that the fixing holes are correctly aligned. High-quality artisanal straps guarantee superior mechanical reliability and aesthetic longevity compared to industrial production.

How long does a leather strap last over time?

A quality leather strap, with proper maintenance, lasts between 3 and 7 years. Duration depends on intensity of use, exposure to moisture and sweat, and the tanning method employed. Vegetable tanning ages better and develops patina; excessively thin leather wears more quickly. Avoid prolonged direct sunlight exposure and clean regularly with a slightly dampened cloth.

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