Strap for PrimaLuna Automatic 30 Stainless Steel / MOP / Bracelet

The lug width of the Longines PrimaLuna L8.113.4.87.6 is 8mm. This specification is determined by the proportions of the 30mm case and is essential for the correct installation of aftermarket straps. The measurement must be taken between the internal lugs of the case, excluding any external protrusion. Any compatible strap must respect this dimension with minimal tolerance to ensure stable and comfortable fit.

Alligator represents the most elegant choice for the PrimaLuna L8.113.4.87.6, thanks to its geometric grain that harmonises perfectly with the clean lines of the case. Calf leather subjected to vegetable tanning offers a soft texture and a patina that evolves over time. For daily versatility, a black leather strap with deployant clasp allows rapid transition between formal and informal contexts. Natural rubber is a modern and durable choice, ideal for more dynamic use.

To change the strap you need a spring bar tool. Position the watch on a soft surface, apply the tool into the slot on the inner side of the lug, press to compress the internal spring and remove the old strap. Insert the new 8mm strap onto the same pin, ensuring the pin returns to its resting position. Repeat for the other side of the case. If you do not have the tool or prefer to avoid risk, the Casati Milano atelier offers installation service.

Yes, it is possible to use aftermarket straps compatible with an 8mm lug width. Compatibility depends solely on respecting the lug dimension. The stainless steel case is stylistically neutral, so the aftermarket strap does not run the risk of chemical reactions. However, it is important that the strap is made to high quality standards to avoid compromising the aesthetics of the timepiece and to guarantee durability over time.

The durability of a leather strap depends on leather quality, frequency of use and care. A high-quality alligator or calf strap can last 3-5 years in moderate daily use, up to 7-10 years if worn occasionally. Vegetable tanning allows a patina that testifies to the passage of time without compromising structural integrity. External factors such as humidity, direct sun exposure and perspiration accelerate wear. The Casati Milano atelier offers an 18-month guarantee on bespoke straps and advice on proper maintenance.