Longines · Saint Imier

Strap for Saint-Imier Date 38.5

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
ReferenceL2.763.4.52.3 (aka: L27634523)
FamilySaint Imier
MovementLongines caliber L619.2 Hours, Minutes, Seconds | Date
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 Saint Imier L2.763.4.52.3 (aka: L27634523)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Saint Imier L2.763.4.52.3 (aka: L27634523), seen from the bench

The Longines Saint-Imier L2.763.4.52.3 is a 38.50mm stainless steel watch representing the brand's watchmaking heritage since 1832 in Saint-Imier, Switzerland. It features the Longines caliber L619.2 automatic movement with manual winding, hours, minutes, seconds, and date window. The 20mm lug width is a standard measurement that ensures broad compatibility with interchangeable straps and proper proportioning between case diameter and overall visual mass.

Frequently asked questions

What is the lug width of the Longines Saint-Imier L2.763.4.52.3?

The Longines Saint-Imier L2.763.4.52.3 features a lug width of 20mm. This dimension represents the distance between the lugs (spring bars) that attach the strap to the case. A 20mm strap will fit perfectly into the case lugs without any play or incompatibility.

Which strap material do you recommend for the Longines Saint-Imier L2.763.4.52.3?

Given the Saint-Imier L2.763.4.52.3's classical and understated identity, it pairs exceptionally well with vegetable-tanned alligator (fine grain, natural patina), vintage calf leather (irregular grain, visible ageing), or shell cordovan (structural density, pronounced chromatic evolution). For sporty contexts, a NATO or rubber Tropic strap offers versatility whilst maintaining the watch's subtle elegance.

How do I change the strap on the Longines Saint-Imier L2.763.4.52.3?

To change the strap, use a spring bar removal tool or small flat lever. Insert the tool gently into the lugs (located at the sides of the spring bars) and press downward to release the pin. Remove the worn strap and insert the new one, ensuring the spring bar sits securely in both lugs. The procedure takes seconds and requires no specialist knowledge.

Are aftermarket straps compatible with the Longines Saint-Imier L2.763.4.52.3?

Yes, any strap with a 20mm lug width is compatible with the Saint-Imier L2.763.4.52.3. The 20mm standard is widely available, offering numerous options: alligator, calf, cordovan, NATO, rubber, canvas. Simply verify that the strap is indeed 20mm to avoid incompatibility issues.

How long does a leather strap last on the Longines Saint-Imier L2.763.4.52.3?

Strap longevity depends on material quality and usage patterns. A quality artisanal alligator or calf strap, worn daily, maintains structural integrity for 4–6 years. Shell cordovan, being denser, can extend this to 6–8 years. Visible ageing (patina, micro-creases, chromatic shifts) is natural and desirable: it imbues the watch with character without compromising functionality. Casati Milano offers an 18-month warranty on all artisanal straps.

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