Strap for Master Collection Date 34 Stainless Steel / MOP

The lug width of the Longines Master Collection L2.357.4.87.0 is 18 millimetres. This measurement represents the distance between the two metal pins to which the strap is attached. Verifying this measurement is essential before purchasing an aftermarket strap: an incorrect size would result in aesthetic degradation and accelerated wear at the attachment points. Longines has dimensioned this lug width to maintain harmonious proportions relative to the 34-millimetre case diameter.

For this 34-millimetre Master Collection, genuine alligator represents the ideal choice: its characteristic grain texture and durability exceeding five years align perfectly with the classical identity of the watch. Vegetable-tanned calf leather offers unique patina development over time, gaining personalisation through use. Alternatively, a tightly woven cotton-nylon NATO strap, paired with a stainless steel deployante buckle, ensures versatility and reliability. Winning colour options are medium brown, black, burgundy, and chestnut-brown (torrone).

Changing the strap on a Longines Master Collection L2.357.4.87.0 requires precision. Locate the two metal pins at the case extremities (one on each side) and use a spring bar tool to compress the internal spring of the pin, releasing the previous strap. Insert the new strap by positioning one end in the pin first, then compress the spring to fully engage the attachment. Verify that the strap is secure by gently pulling before wearing the watch. If inexperienced, consult a jeweller or specialised atelier.

All straps with an 18-millimetre lug width are compatible with the Longines Master Collection L2.357.4.87.0. Milano Straps offers 18mm straps in alligator leather, vegetable-tanned calf, NATO fabric, and FKM rubber. Straps are available ready for shipment or customisable in size, initials, and stitching colour through the Casati Milano atelier. The warranty covers 18 months from purchase.

Genuine alligator strap, properly maintained, has an average lifespan of 5–7 years, depending on use and exposure to moisture, heat, and perspiration. Vegetable-tanned calf leather may last 4–6 years, developing appreciated historical patina amongst collectors. Durability depends on external factors: seasonal strap rotation and periodic cleaning significantly extend leather lifespan. FKM rubber straps last 3–4 years (with superior moisture resistance), whilst NATO fabric straps last 4–5 years depending on mechanical wear.