Strap for PrimaLuna Automatic 26.5 Two Tone Pink Diamond

The lug width of the Longines PrimaLuna L8.111.5.79.6 is exactly 6.00mm. This specific measurement is calibrated to the 26.50mm case diameter and is critical for aesthetic fit. An oversized strap would burden the wrist visually, whilst a narrower strap fails to anchor the case geometry adequately. Measure internally with a digital calliper, from the seating point to the opposite edge.

Material selection depends on intended use. Mississippian alligator represents the formal choice: fine natural grain, non-uniformed texture, reflecting light with delicate elegance. Full-grain calfskin offers a patina evolving over time with lower cost basis. Shell cordovan suits those valuing constructive longevity beyond three decades. Vegetable-tanned leather introduces temporal awareness: the leather shifts colour and develops noble patina. In summer, high-quality nylon NATO maintains freshness whilst reducing moisture. Avoid low-grade synthetics: the PrimaLuna demands constructive coherence.

Strap replacement follows the universal method: position the watch face-down, locate the metal spring bars protruding laterally from the case (one per side), and use a spring bar tool to compress the internal spring mechanism. Once freed, extract the old strap and install the new one, ensuring both spring bars click securely into position with an audible snap. Avoid excessive downward pressure: spring bars lock through horizontal compression, not vertical force. If uncertain, the Casati Milano atelier executes this service complimentarily for straps ordered via the website.

Only if the lug width is precisely 6.00mm. Many 'universal' straps are manufactured in standard dimensions of 6.5mm or 5.5mm: though superficially similar, they create unwanted play between case and strap. We recommend sourcing straps specifically dimensioned to 6mm. Milano Straps maintains a comprehensive collection of 6mm-compatible straps available for rapid dispatch and personalisation through Casati Milano for those seeking full bespoke integration.

A high-quality full-grain leather strap, worn daily with rotation (3-4 straps in active use), lasts 3-5 years before replacement due to mechanical wear. Alligator and shell cordovan, owing to denser fibre structure, achieve 7-10 years lifespan. Natural vegetable-tanned leather wears more rapidly visually but develops ennobling patina. Determinant factors include: solar exposure, ambient humidity, wear frequency and perspiration intensity. Casati Milano guarantees 18 months on bespoke straps and offers maintenance and lace replacement services by appointment.