Longines · PrimaLuna

Strap for PrimaLuna Quartz 23 Two Tone Pink MOP

Takes 6 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width6 mm
Case diameter23 mm
ReferenceL8.109.5.87.6 (aka: L81095876)
FamilyPrimaLuna
MovementLongines caliber L963 Hours, Minutes | Date
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

The PrimaLuna L8.109.5.87.6 (aka: L81095876), seen from the bench

The Longines PrimaLuna reference L8.109.5.87.6 mounts the L963 caliber with indication of hours, minutes and date. The watch features 6mm lugs and a quartz movement. The PrimaLuna collection is characterized by an elegant design with a tonneau-shaped case.

Frequently asked questions

What is the exact lug width of the Longines PrimaLuna L8.109.5.87.6?

The lug width is 6mm, one of the most critical parameters in contemporary feminine watchmaking. This measurement must be verified perpendicularly to the lug tube, from external wall to external wall. For the L8.109.5.87.6 model, Longines certifies this value with minimal manufacturing tolerance. Any aftermarket strap must be measured identically before purchase: even a 0.3mm discrepancy can compromise fitment.

Which strap material best complements the Longines PrimaLuna L8.109.5.87.6?

Mississippian alligator is the aesthetically privileged choice for this model, thanks to its regular texture that harmonises with the case's miniaturised proportions. Vegetable-tanned calfskin offers an equally refined alternative, with the advantage of developing natural patina over time. For high-frequency daily use, Cordura-weave NATO straps or quality elastomers provide practical solutions without visual compromise to the collection.

How do you change the strap on a Longines PrimaLuna L8.109.5.87.6 without risk to the case?

Strap replacement on this model requires specific tools: a thin flathead screwdriver (maximum 1.2mm) and an anti-scratch work surface with a padded mat. Position the watch with the case facing downward, identify the two lateral pins securing the lug bars to the case, and remove using uniform screwdriver pressure. Gently extract the pin outward. Repeat on the other side. Insert the new strap with holes aligned to the lugs, reposition the pins from external to internal, ensuring the strap is centred. If uncertain, entrust the task to a professional atelier such as Casati Milano.

Is there a certified aftermarket strap compatible with the Longines L8.109.5.87.6?

Yes, numerous aftermarket straps are available in 6mm lug width and certified for the PrimaLuna. Milano Straps offers a comprehensive collection of 6mm straps in various materials (alligator, vegetable-tanned calfskin, NATO, rubber) customisable in length, colour and thread. Each strap is measured according to watchmaking standards prior to dispatch. For an even more personalised experience, Casati Milano atelier creates made-to-order straps with material consultation and preview via WhatsApp, guaranteed for 18 months.

How long does a leather strap last on a Longines PrimaLuna L8.109.5.87.6 with daily use?

The lifespan of a leather strap depends on the chosen material and usage conditions. Vegetable-tanned alligator, worn daily on a 23mm watch, typically reaches 3-4 years before visible wear appears. Softer calfskin leathers have slightly shorter lifespan (2.5-3 years), whilst rubber saddlery or Cordura-weave straps exceed 5 years. Determining factors include: freshwater and saltwater exposure, ambient humidity percentage, frequency of shoulder replacement, and stitching accuracy. A Casati Milano strap benefits from premium materials and reinforced artisanal stitching, naturally extending longevity towards the upper limits of this range.

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