Strap for Saint-Imier Date 30 Diamond

The lug width (strap width) of the Longines Saint Imier L2.563.0.87.6 is 15mm. This measurement represents the distance between the two spring bar pins on the case and is the essential technical specification for purchasing a compatible strap. Always verify this dimension before ordering by measuring the distance between the spring bars once you have removed the original strap.

The optimal strap choice depends on your intended use and dial tone. For formal elegance, a vegetable-tanned alligator in dark brown or cognac is supreme, developing a rich patina over time. A spun brushed calf leather in black offers contemporary versatility. A shell cordovan strap in cigar colour is universally elegant and adapts to any context. For sporty daily wear, a NATO strap in heavy cotton or an FKM rubber strap guarantees practicality without aesthetic compromise.

The strap is secured using spring bars. To replace it: 1) Position the watch on a soft cloth. 2) Using a spring bar tool, gently press the small lateral spring pin on one bar to release it from the case lugs. 3) Repeat for the other bar. 4) Insert the spring bars into the holes of the new strap, ensuring they lock securely into the case seats. If you prefer to avoid any risk of damage, entrust the task to a qualified watchmaker.

Yes, Milano Straps offers a comprehensive range of hand-crafted 15mm straps compatible with your timepiece. Available online in leather (alligator, calf, shell cordovan), fabric (NATO, linen) and rubber (FKM). All are customisable in length, initials and thread colour. For a bespoke experience, the Casati Milano atelier creates custom straps with personal hide selection, WhatsApp updates and an 18-month warranty.

Leather strap longevity depends on the material and frequency of wear. A high-quality artisanal alligator or calf leather with vegetable tanning, worn moderately and properly maintained (gentle cleaning, avoiding prolonged moisture exposure), lasts 3–5 years. Shell cordovan, being more durable, can exceed 5 years. A heavy cotton NATO easily reaches 7–10 years of reliable service. The aesthetic ageing—patina development and tone shift—is intentional and desirable, representing added value in a handcrafted strap.