Strap for Lyre 35 Quartz Stainless Steel

The lug width of the Longines Lyre L4.759.4.12.6 is 18 millimetres. This dimension represents the internal distance between the two case lugs, where the strap is inserted. It is essential to measure this specification accurately using a digital calliper to ensure complete compatibility with any aftermarket strap. Even a minor measurement error compromises both aesthetics and wrist security.

The choice of material depends on intended use and personal style. Alligator remains the most traditional and elegant solution, enhancing the model's formality with its characteristic grain. Italian nappa calf, treated with vegetable tanning, develops natural patina over time and suits those who appreciate authentic ageing. Hungarian shell cordovan offers superior durability and natural lustre without synthetic treatments. For more versatile contexts, silk or cotton NATO fabric allows occasional pairings whilst maintaining elegance.

To change the strap, carefully remove the spring bars from the lugs using a dedicated removal tool or small flat lever. The process requires delicacy to avoid damaging the case. Position the new strap by aligning the holes with the lugs, then reinsert the spring bars ensuring they are perfectly secured. If you are inexperienced, we recommend entrusting the operation to a qualified watchmaker or the Casati Milano team to guarantee artisanal precision.

Yes, any aftermarket strap with an 18-millimetre lug width is compatible with the Lyre L4.759.4.12.6. However, technical compatibility does not always guarantee the desired aesthetic result. MilanoStraps offers 18mm straps specifically calibrated for Longines models, with curves and thicknesses that respect case proportions. For optimal results, we also recommend bespoke customisation at the Casati Milano atelier.

The lifespan of a leather strap depends on material quality and usage patterns. High-quality alligator and calf typically last 3–5 years with moderate wear, developing characteristic patina. Hungarian shell cordovan is more resilient and may last 5–7 years. Wear manifests through creasing, fading, and loosening stitching. MilanoStraps offers straps with an 18-month warranty, whilst bespoke models crafted at Casati Milano benefit from the same coverage, including consultation for optimal maintenance and preservation.