Strap for Master Collection Chronograph 40 Stainless Steel / Black - Roman / Bracelet

The lug width of the Longines Master Collection L2.629.4.51.6 is 20mm. This measurement represents the distance between the two lugs and is specific to this model. To verify aftermarket strap compatibility, measure the distance between the spring bars excluding their thickness. An incorrect measurement may compromise proper strap fitting to the case.

For the Master Collection L2.629.4.51.6, an alligator strap in medium brown is the most natural and formal choice, perfectly balanced with the 40mm stainless steel case. Vegetable-tanned calf leather represents an excellent alternative for those seeking natural patination and golden ageing over time. For a sportier profile, rubber or NATO straps remain appropriate. Shell cordovan is not recommended for this model due to its initial rigidity, which would create excessive contrast with the elegant restraint of the Master case.

Changing the strap on the Longines Master Collection L2.629.4.51.6 requires a spring bar tool. Position the watch with the lugs facing upward. Insert the thin end of the tool into the release hole of the first spring bar (located between the case and lug), push gently outward to compress the internal spring, then extract the bar completely. Repeat for the other lug. Insert the new strap by sliding the bars through the lugs until they click into position. If inexperienced, consulting a professional is advised to prevent damage to the delicate bars.

Yes, the Longines Master Collection L2.629.4.51.6 is fully compatible with quality 20mm aftermarket straps, provided they are constructed to proper standards and have appropriately sized spring bars. Aftermarket straps in alligator, calf, rubber, and NATO from 20mm available on milanostraps.it have been tested for compatibility with this specific model. Always verify the correct lug width before purchase.

The lifespan of a leather strap depends on material, usage, and maintenance. A quality alligator or calf strap can last 3-5 years with daily wear and regular care (gentle cleaning with a damp cloth, rapid drying). Shell cordovan may last longer due to its natural density. Factors such as humidity, perspiration, and sun exposure accelerate leather ageing. A rubber strap has similar longevity but is less sensitive to moisture. Vegetable-tanned leather tends to last longer and develops a fascinating patina over time.