Strap for PrimaLuna Quartz 26.5 Stainless Steel / MOP - Diamond / Bracelet

The lug width of the Longines PrimaLuna L8.120.4.87.6 is 6mm. This measurement represents the distance between the two lugs of the case where the strap attaches. Verification with a digital calliper is essential before ordering an aftermarket strap, as an incorrect measurement compromises the fit and security of the timepiece.

The best strap depends on usage and aesthetic preference. For formality and classical elegance, alligator in natural tones (cognac brown, black) or vegetable-tanned leather is recommended. For daily versatility, smooth leather in neutral shades. For a sporty-chic style, rubber or polyurethane straps with a folding clasp. The choice should respect the compact proportions of the 26.50mm case, avoiding materials too heavy that would unbalance the aesthetic.

Strap replacement requires a spring bar tool (spoon-shaped instrument) or, preferably, the assistance of a professional watchmaker. Insert the tool beneath the spring bar retention spring, then extract the metal bar from the case lugs. Repeat on the other side. Align the new strap holes with the lugs and reinsert the spring bars. To avoid damage to the caseback or crystal, do not improvise with unsuitable tools.

Yes, provided the lug width is exactly 6mm and the strap has been constructed for this measurement. Many artisanal straps, including those from Milano Straps, are customisable and fully compatible with the model. Always verify the technical specifications of the strap before purchase and, if in doubt, contact the manufacturer to confirm compatibility.

The lifespan of a leather strap depends on the quality of the tanning, daily use, and maintenance. A high-quality alligator or leather strap can last 3-5 years with daily wear, developing a noble patina over time. Lesser-quality leather will have a shorter lifespan. Prolonged exposure to moisture, sweat, and sunlight shortens strap life. Regular maintenance — gentle cleaning and drying — significantly extends durability.