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Longines · Saint Imier

Strap for Saint-Imier Date 30 Two Tone

Takes 15 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

15mm
15 mm strapsAll Longines
Lug width15 mm
Case diameter30 mm
ReferenceL2.563.5.52.3 (aka: L25635523)
FamilySaint Imier
MovementLongines caliber L595 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

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The Saint Imier L2.563.5.52.3 (aka: L25635523), seen from the bench

The Longines Saint-Imier L2.563.5.52.3 is a modern interpretation of a collection founded in 1832 in the Swiss town that gives the line its name. This 30mm women's steel dress watch features the L595 manual-wind caliber visible through a transparent caseback, with a refined case design that prioritizes visual balance. The stainless steel case is water-resistant to 30 meters and houses a dial with hours, minutes, seconds, and date functions. The 15mm lug width is proportionally calculated for this specific case diameter to ensure minimal lateral movement when paired with appropriate straps.

Frequently asked questions

What is the exact lug width of the Longines Saint-Imier L2.563.5.52.3?

The lug width is 15mm. This measurement must be verified by positioning the calliper on the inner shoulder of the lug, without including the curve of the case. For a compatible strap, it is essential to check the height of the strap relative to the case lugs as well.

What is the best strap material for the Longines Saint-Imier L2.563.5.52.3?

For this 30mm stainless steel case, we recommend alligator for formal elegance with deep patina, calf for daily versatility, or shell cordovan for extraordinary wear resistance. The choice depends on intended use and desired stylistic atmosphere.

How do I change the strap on my Longines Saint-Imier L2.563.5.52.3?

Position the watch on a soft surface with the caseback facing upward. Insert a spring bar tool (small fork-shaped instrument) into the side slot of the lug to compress the spring bar. Gently pull the old strap and repeat on the opposite side. Install the new strap by aligning the lugs to the case.

Can I use a bespoke aftermarket strap at 15mm width on this watch?

Yes, it is possible if the aftermarket strap is certified for 15mm lugs. Verify that the width is precise (maximum tolerance ±0.5mm) and that the strap height does not create a "bridge effect" relative to the case lugs. Bespoke handcrafted straps guarantee absolute compatibility.

How long does a leather strap last on the Longines Saint-Imier L2.563.5.52.3?

Well-vegetable-tanned alligator lasts 8-10 years of daily use. Calibrated calf has a lifespan of 4-5 years. Shell cordovan can exceed 10 years. Durability depends on climate, humidity exposure, and frequency of use. Periodic maintenance (cleaning, conditioning) extends the life of the 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