Strap for PrimaLuna Quartz 23 Two Tone Diamond MOP

The Longines PrimaLuna L8.109.5.97.6 features a lug width of 6 millimetres, a specific design choice consistent with the 23mm case diameter. This narrow lug width is determined by the proportion between the attachment lugs and case geometry: a 6mm width ensures a secure fit without excessive play whilst maintaining strap stability on the wrist.

Choice depends on intended use and colour preferences. A black alligator strap represents the most elegant formal solution, owing to its geometric grain and controlled rigidity that keeps the timepiece stable. A vegetable-tanned calf leather in cognac brown creates sophisticated dialogue with the mother-of-pearl dial and develops rich patina through wear. For contemporary contexts, a rubber or Cordura canvas strap in light blue offers versatility whilst maintaining aesthetic coherence with the PrimaLuna's minimalist design.

The strap is removed using a spring bar tool inserted into the lateral hole of each attachment lug. Applying gentle pressure to the internal spring releases the pin, allowing removal from the case. Installation of the new strap follows the reverse procedure: insert the pin into the new lug, align the case and press until the click closure engages. With a 6mm lug width, it is essential to verify that the strap exhibits no excessive lateral play that would cause unwanted case movement.

Yes, milanostraps.it offers a complete collection of aftermarket straps with 6mm lug width specifically compatible with the PrimaLuna and similar models. These straps are customisable in length, leather choice (alligator, calf, rubber), buckle finish and stitching thread colour. It is also possible to commission a bespoke strap from the Casati Milano atelier for a completely personalised experience.

Lifespan varies according to material and frequency of use. A quality alligator strap with vegetable tanning typically lasts 5-8 years with daily wear, as the material maintains elasticity and resistance over time. A vegetable-tanned calf strap usually lasts 4-6 years, developing increasingly rich patina. Degradation accelerates with direct sun exposure, constant humidity and frequent perspiration. Casati Milano straps include an 18-month warranty against manufacturing defects and premature wear.