Strap for Master Collection 41 Retrograde Moonphase Stainless Steel / Silver-Roman / Alligator

The lug width of the Longines Master Collection L2.738.4.71.3 is 20 millimetres. This measurement is critical for selecting the correct strap: it represents the distance between the two integrated lugs of the case, measured interior to interior. A 20mm strap will fit the lug horns perfectly without play or forcing. When ordering a strap from milanostraps.it, always confirm it is specified for 20mm lug width to ensure compatibility.

The ideal material depends on context. Genuine alligator is the primary choice: its regular texture and natural lustre complement the watch's elegant character, reinforcing its artisanal heritage. For a quality alternative, vegetable-tanned calf develops a unique patina over time. For informal contexts, a heavy canvas NATO or vintage vulcanised rubber maintain aesthetic balance without compromise. The choice depends on primary use: formal, daily wear, or travel.

The Master Collection L2.738.4.71.3 features integrated lugs, requiring a spring bar tool to remove and install the strap. The procedure is: 1) Position the watch case-down on a soft surface. 2) Use the spring bar tool to gently press the spring inward, releasing the old strap. 3) Align the new strap ends with the lugs and push until you hear a click. If you wish to avoid the risk of scratching the case, professional watchmakers can complete this change in minutes. Milanostraps.it also offers pre-mounted and tested straps with rapid delivery.

Not recommended. Whilst generic 20mm aftermarket straps are physically compatible, build quality varies significantly. A poor-quality strap compromises the aesthetic balance of a luxury watch and prematurely wears the case lugs. On milanostraps.it you will find artisanal straps specifically curated for watches in this category: certified leather, precise finishing, customisable thread colour. Additionally, the Casati Milano atelier creates bespoke straps with direct quality control and an 18-month warranty—a service level that generic alternatives do not provide.

Durability depends on leather quality and intensity of use. Genuine alligator in vegetable tanning, worn daily with occasional maintenance (soft cloth cleaning, protection from excess humidity), lasts 4–6 years. Vegetable-tanned calf has similar longevity, often greater because the leather is thicker. If the watch is worn intermittently (2–3 times weekly), lifespan extends to 8–10 years. Vulcanised rubber and canvas NATO exceed 10 years. The dominant factor is initial build quality: an artisanal atelier strap (such as Casati Milano) lasts significantly longer than industrial alternatives. Storing the strap away from direct sunlight and extreme humidity further extends service life.