Longines · Master Collection

Strap for Master Collection Date 34 Stainless Steel / Silver

Takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width18 mm
Case diameter34 mm
ReferenceL2.357.4.70.2
FamilyMaster Collection
MovementLongines caliber L888.5 hours, minutes, seconds | date | chronometer
Year2024
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 Collection L2.357.4.70.2

Selected for the 18 mm lug width

All 18 mm straps →

The Master Collection L2.357.4.70.2, seen from the bench

The Master Collection represents one of Longines' classic lines, characterized by traditional design and essential complications. The reference L2.357.4.70.2 features the automatic L888.5 caliber with chronometer certification, offering indication of hours, minutes, seconds and date. The watch has 18mm lugs for the strap.

Frequently asked questions

What is the lug width of the Longines Master Collection L2.357.4.70.2?

The lug width measures 18mm, a rare dimension outside standard industrial production ranges. This is the distance measured perpendicularly between the internal lug attachments on the case. Always verify this measurement using a digital calliper before ordering an aftermarket strap to ensure perfect compatibility.

What is the best strap material for the Longines Master Collection L2.357.4.70.2?

The choice depends on intended use and aesthetic preference. Alligator is ideal for formal and evening occasions, featuring regular grain texture and natural patina development. Vegetable-tanned calfskin offers daily versatility and accelerated patina formation over time. Black or navy rubber provides practicality in humid environments whilst maintaining elegant proportions. Shell cordovan, though expensive, offers natural rigidity and unparalleled colour depth.

How do I change the strap on the Longines Master Collection L2.357.4.70.2?

The replacement is straightforward and requires no specialised tools. Position the watch face-down. Insert a spring bar tool or toothpick into the small lateral apertures beside the case lugs, applying gentle inward pressure to disengage the spring bar mechanism. Once the spring bar is removed, take off the old strap and insert the new one by aligning one side first, then pushing the lug bar until the final click.

Can I use an aftermarket-compatible strap on this model?

Yes, provided the strap is specifically designed for 18mm lug width with approximately 2.2mm lug bore depth. Artisanal straps from milanostraps.it are manufactured to these specifications and guarantee full compatibility. Always verify total length dimensions (minimum 18cm) and thickness to prevent compression or excessive play.

How long does a leather strap last on a Longines watch like this Master Collection?

A quality leather strap has an average lifespan of 3–5 years with daily wear, extendable to 8–10 years with proper maintenance. Accelerated deterioration depends on exposure to moisture, perspiration and UV radiation. Alligator straps last longer due to natural water resistance. Milanostraps.it straps benefit from an 18-month warranty and can be replaced or regenerated at the Casati Milano atelier.

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