Strap for Master Collection 44 Retrograde Stainless Steel / Silver-Arabic / Alligator XL

The lug width of the L2.717.4.78.5 is 20 millimetres. This measurement represents the internal distance between the lugs of the case and determines compatibility with replacement straps. To verify the correct measurement, use a digital calliper or millimetre ruler, positioning it between the internal pins of the lugs. Accurate measurement is essential to ensure the strap fits without excessive play.

The most suitable strap for this model depends on the intended use and personal preferences. For formal occasions or elevated elegance, we recommend an alligator strap of superior quality with uniform fine grain. For a more characterful and dynamic aesthetic, vegetable-tanned calf leather offers versatility and develops a beautiful patina over time. Shell cordovan guarantees exceptional durability and represents a minimalist and sophisticated choice. For everyday wear, a NATO strap or vulcanised rubber band ensures practicality without aesthetic compromise.

The strap on the L2.717.4.78.5 is changed by extracting the anchor pins (spring bars) positioned beneath the lugs of the case. Using a dedicated tool (spring bar tool) or a thin flat-bladed implement, gently press the small button or groove on the pin, then slide the old strap outward. Next, insert the new strap by aligning the holes with the pins and secure the position by extracting the pin until you feel a click. This operation requires care to avoid scratching the case: if uncertain, consult an expert.

Absolutely. The L2.717.4.78.5, with its 20-millimetre lug width, is compatible with any strap manufactured to this specific width. High-quality artisanal aftermarket straps, made from premium leathers such as alligator, vegetable-tanned calf or shell cordovan, often offer more sophisticated construction and superior customisation options compared to original Longines alternatives. Ensure the strap has a thickness between 3.5 and 5 millimetres for optimal fitting to the lugs.

The lifespan of a natural leather strap depends on frequency of use, leather quality, tanning method and environmental exposure (humidity, heat, chemical agents). A high-quality alligator strap, worn moderately (2–3 days per week), can last 5–8 years before replacement becomes necessary due to visible wear. Vegetable-tanned calf leather typically lasts 3–5 years under normal use conditions, whilst shell cordovan, thanks to its robust structure, can exceed 10 years with proper maintenance. Regular cleaning with a damp cloth and occasional application of natural conditioner (such as vegetable waxes specific to leather) significantly extend the useful life of the strap.