Strap for PrimaLuna Automatic 30 Two Tone Pink Diamond Funky MOP

The lug width of the Longines PrimaLuna L8.113.5.88.6 is 8 millimetres. This technical specification is determinant for strap selection: there is no margin for variation. A strap constructed for an 8mm lug width features stitch holes and an internal structure calibrated precisely to this dimension. Longines has never compromised on this production specification, confirming a constructive coherence in which each component reflects the proportional logic of the ensemble.

For the Longines PrimaLuna L8.113.5.88.6, an alligator strap with fine grain represents the most refined choice: the natural patterns of the skin create a texture that captures light organically. Alternatively, vegetable-tanned calf leather in dark brown tones offers a patina that develops over time, generating an increasing tactile relationship with the timepiece. For summer use, a structured rubber strap maintains visual proportions without sacrificing comfort. The key is to select a material that balances the lightness of the case with adequate visual density.

Strap replacement requires the use of a spring bar tool, a specialised instrument that allows compression of the small pins that secure the lug to the case. Position the watch on a soft surface (microfibre cloth), locate the case lug, insert the spring bar tool tip into the small lateral hole, compress the pin and slide the previous strap away. Insert the new strap by aligning the holes with the lugs, then release the pin. This process requires no professional expertise, but a degree of care is necessary to avoid scratching the case.

Yes, aftermarket straps with 8mm lugs are available online. However, not all aftermarket straps meet Longines construction standards. Select manufacturers specialising in luxury watches who guarantee precision tolerances: the lug width must be exactly 8mm, the stitch holes must align perfectly with the case lugs, and the material must be certified (genuine alligator, full-grain calf, structured rubber). Casati Milano offers custom straps with direct client material selection, backed by an 18-month warranty.

The lifespan of a leather strap depends on daily wear, climate conditions and leather quality. An alligator or vegetable-tanned calf strap, used with care and properly maintained, can last 3–5 years. Prolonged exposure to moisture, chlorine and UV rays accelerates ageing. The natural patina that develops on premium leather is a desirable characteristic, not a defect. To extend usable life, avoid direct contact with saltwater, do not bend the strap beyond its elastic limits, and occasionally apply a conditioner formulated for fine leathers. Casati Milano straps include an 18-month warranty and can be renewed through the atelier.