Strap for Lyre 40 Automatic Stainless Steel / White - Roman / Bracelet

The lug width (or watch strap width) of the Longines Lyre L4.961.4.11.6 is 21 mm. This measurement is specific to this model and essential for selecting a compatible strap. The measurement is taken by verifying the internal space between the two lugs on the watch case.

We recommend alligator leather in cognac or deep black for formal elegance, vegetable-tanned calf leather in earth tones for everyday versatility, or shell cordovan for those seeking a rare, premium hide. For sports use, cotton/silk NATO or FKM rubber offer durability whilst maintaining aesthetic integrity. Your choice depends on personal style and primary context of use.

Strap replacement involves removing the spring bars—small metal cylinders connecting the strap to the case. Use a spring bar tool to gently depress one retaining clip, extract the old strap, and insert the new one, ensuring the spring bars are fully seated. If inexperienced, we recommend consulting a certified watchmaker or our Casati Milano atelier to prevent damage.

Yes, any strap with a 21 mm lug width is physically compatible with your Longines. However, construction quality is paramount—inferior straps compromise the watch's aesthetic integrity. Our artisanal straps are handcrafted from premium hides with precise finishing, ensuring both compatibility and visual harmony.

Longevity depends on leather quality and frequency of wear. Alligator or shell cordovan artisanal straps typically last 3–5 years with daily use, developing a beautiful patina. Vegetable-tanned calf offers similar durability. Budget leather deteriorates within 12–18 months. All our products include an 18-month warranty against manufacturing defects.