Strap for Flagship 38.5 Automatic Stainless Steel / White - Roman / Bracelet

The lug width of the Longines Flagship L4.974.4.21.6 is 20 mm. This measurement is critical to maintain the proportional balance of the 38.50 mm case and ensure correct wearability. A strap with incorrect lug width would compromise the watch's stability on the wrist.

For this classical timepiece, alligator leather suits formal occasions, vegetable-tanned calf leather develops a natural patina over time, cotton NATO fabric offers versatility, and FKM rubber serves light sports use. The choice depends on dial colour (blue, white, or sunburst) and intended usage.

The Flagship uses standard straight lugs measuring 20 mm. To replace the strap, gently remove the spring bars using a strap tool: position the tool beneath the lug, then extract the pin by compressing slightly inward. Align the new strap ends with the lug seats and press until the spring bar clicks into place.

Yes, any strap with 20 mm lug width is compatible, provided the terminal ends are finished with precision. Artisanal straps from MilanoStraps are specifically engineered to ensure correct tolerances and material stability, preserving the watch's formal elegance.

A quality leather strap (alligator or vegetable-tanned calf) worn daily typically lasts 3 to 5 years before replacement is advisable. Longevity depends on environmental humidity, frequency of use, and maintenance (periodic cleaning with soft cloth). MilanoStraps guarantees against manufacturing defects for 18 months.