Strap for Flagship 38.5 Two Tone / Gold Diamond

The lug width of the Longines Flagship L4.874.3.37.7 is 20 mm. This measurement represents the internal distance between the two lateral lugs of the case where the strap attaches. Any strap with a 20 mm lug width is compatible with this model.

For the Flagship L4.874.3.37.7, straps in natural alligator, shell cordovan, or vegetable-tanned leather are the most harmonious choices. Dark brown or black alligator delivers understated elegance. Shell cordovan develops a unique patina over time. Vegetable-tanned leather is the most versatile choice for daily wear, offering soft grain that respects the piece's classical aesthetic.

To change the strap, you need a spring bar tool (lug removal lever). Insert the tool under the lug from the inside, gently lever to release the spring mechanism, then remove the lug. Repeat on the other side, then insert the new strap's lugs by reversing the process. If uncertain, consult a professional watchmaker.

Yes, any strap with a 20 mm lug width is compatible with the Flagship L4.874.3.37.7. Quality aftermarket straps (leather, NATO, rubber) offer the same functionality as originals, with the advantage of aesthetic customisation. Choose reputable brands that guarantee construction quality and material durability.

A quality leather strap (alligator, shell cordovan, vegetable-tanned leather) on a daily-wear watch typically lasts 3-5 years. Durability depends on use, care (avoid excessive water and humidity), and tanning method. A microperforated steel deployante reduces stress on the leather. Atelier Casati Milano offers an 18-month warranty on bespoke straps.