Strap for PrimaLuna Quartz 30 Stainless Steel / Yellow Gold / Diamond / MOP

The lug width of the Longines PrimaLuna L8.112.5.97.2 is exactly 7mm. This technical specification is fundamental for selecting a compatible strap: any strap purchased must have a width of precisely 7mm. You can verify this measurement by removing the original strap and measuring the distance between the two internal attachment points of the case with a digital caliper.

For a timepiece of this refinement, alligator leather with vegetable tanning is the finest choice: the reptile's natural scales create an elegant and uniform texture, and the strap develops a magnificent patina naturally over time. Shell cordovan, harvested from the horse's croup, is an alternative offering a unique biological colour shift. Smooth calf leather remains the most versatile option for daily wear, whilst grained calf provides sophisticated tactile texture with visual movement.

To change the strap, you must remove the spring bars from the case lugs. Use a dedicated strap-change tool or a small flat lever: insert the tip under the spring bar from one side, lift gently to release the spring, and slide out the old strap. To install the new strap, align the hole with the spring bar, compress it slightly, and snap it into place on the opposite side. It is advisable to have a professional watchmaker or authorized retailer perform this operation to avoid damage to the case.

All straps with a 7mm lug width are compatible. milanostraps.it offers a specialised collection of artisanal 7mm straps made from alligator, calf, shell cordovan and other premium materials. Each strap can be customised in length, initials and stitching thread colour. High-quality aftermarket straps often offer superior finishes and materials compared to OEM options, whilst allowing you to express personal style without compromising technical compatibility.

The lifespan of a leather strap depends on the material, frequency of use and maintenance. An alligator or shell cordovan strap with vegetable tanning can last 8–12 years of daily wear, with gradual aesthetic deterioration and natural ageing that enhances its aesthetic value. A calf strap, with regular maintenance (periodic cleaning and conditioning), lasts 5–8 years before replacement is necessary. More delicate materials such as crocodile or python may last 6–10 years. Most artisanal, high-quality straps are supplied with an 18-month warranty against manufacturing defects.