Longines · PrimaLuna

Strap for PrimaLuna Quartz 23 Two Tone Pink Diamond 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
ReferenceL8.109.5.89.6 (aka: L81095896)
FamilyPrimaLuna
MovementLongines caliber L963 Hours, Minutes | Date
CaseMother of Pearl | Pink Gold, Stainless Steel

Spring bar

Swiss Standard universal spring bars

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

The PrimaLuna L8.109.5.89.6 (aka: L81095896), seen from the bench

The Longines PrimaLuna reference L8.109.5.89.6 is powered by the L963 caliber with hour, minute and date indication. The watch features 6mm lugs for the strap. The movement offers the essential time-reading functions with a date complication.

Frequently asked questions

What is the lug width of the Longines PrimaLuna L8.109.5.89.6?

The lug width of the Longines PrimaLuna L8.109.5.89.6 is 6 millimetres. This measurement represents the distance between the internal spring bars of the case and is the fundamental parameter for selecting compatible straps. Any aftermarket strap must respect this measurement with a maximum tolerance of ±0.1 millimetres to ensure secure attachment without play.

Which strap type is recommended for the Longines PrimaLuna L8.109.5.89.6?

For the Longines PrimaLuna L8.109.5.89.6, alligator leather represents the most aesthetically coherent choice owing to its regular grain and the patina that develops naturally with use. Vegetable-tanned calf leather offers a robust alternative with elegant ageing, whilst NATO canvas is ideal for summer and casual wear. Vulcanised rubber is recommended for those prioritising tactile comfort and moisture resistance without functional compromise.

How do you change the strap on the Longines PrimaLuna L8.109.5.89.6?

Strap replacement is accomplished by removing the lateral spring bars using a dedicated watch tool. Position the tool at the internal spring, apply gentle downward pressure to release the spring bar tip, then slide the strap out. The operation requires approximately 2-3 minutes per side. It is advisable not to force components and, when in doubt, entrust the operation to a professional horologist.

Is an aftermarket strap compatible with the Longines PrimaLuna L8.109.5.89.6?

Yes, any strap with a 6 millimetre lug width is compatible with the Longines PrimaLuna L8.109.5.89.6. Milano Straps are constructed with precise tolerances guaranteed within ±0.1 millimetres, ensuring certified compatibility. Online availability permits rapid delivery, with customisation options including sizing, initials, and stitching thread colour.

What is the average lifespan of a leather strap for the Longines PrimaLuna?

The lifespan of a leather strap depends on material quality and intensity of use. High-quality artisanal alligator or vegetable-tanned calf leather, such as Milano Straps, guarantees a lifespan of 3-5 years with daily wear, extendable to 7-10 years with appropriate maintenance. The Casati Milano 18-month warranty covers manufacturing defects. The strap develops natural patina over time, enhancing aesthetic appeal rather than deteriorating.

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