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

The lug width of the Longines Master Collection L2.717.4.78.3 is 20 millimetres. This measurement represents the distance between the two pins (lugs) that connect the strap to the case. To verify compatibility of an aftermarket strap, measure with a digital calliper between the pin centres: the value must be exactly 20 millimetres.

The ideal strap depends on intended use and personal preference. For formal elegance, dark brown or black alligator is the conservative choice that enhances the proportion of the 44-millimetre case. Vegetable-tanned calf leather offers rustic character and natural ageing. Shell cordovan guarantees durability and lasting lustre. NATO fabrics add versatility and sporting practicality. The stainless steel case pairs magnificently with any neutral tonality.

Changing the strap on your Longines requires a spring bar removal tool or strap removal punch. Position the watch with the lugs facing upward, identify the small access hole in the spring bar, insert the punch tool gently and push until the bar slides out of the lug. Repeat for all bars. Insert the new strap by aligning the holes and reintroduce the bars from left to right, ensuring they slide without forcing. If you prefer to avoid risk, entrust the operation to a specialised service centre.

Yes, absolutely. Provided the lug width is precisely 20 millimetres, any aftermarket strap is compatible with the Longines Master Collection L2.717.4.78.3. milanostraps.it offers a complete range of 20mm straps in alligator, calf, cordovan and technical materials, customisable in lengths, initials and stitching thread. Quality aftermarket straps do not compromise the value or functionality of the watch.

The lifespan of a leather strap depends on material, use and care. A quality alligator strap, worn daily, lasts an average of 3–5 years. Vegetable-tanned calf resists 2–4 years, developing fascinating patina in the process. Shell cordovan, thanks to the natural density of its fibres, can last 5–7 years or longer. Leather fears constant moisture and direct exposure to sweat; avoid prolonged immersion and, if wet, dry gently in open air. A durable alternative is the NATO fabric strap, which resists decades of intensive use without failure.