Strap for Flagship 26 Automatic Two Tone White Diamond

The lug width of the Longines Flagship L4.274.3.27.7 is 13 millimetres. This measurement is specific to this model and non-standard compared to contemporary watches. The 13 millimetres represent the distance between the case attachment holes, determining the width of the compatible strap.

The best strap depends on your intended use. For formal elegance, we recommend alligator with vegetable tanning and regular grain, which develops patina over time. For daily versatility, anilina calf leather in brown tones. For summer and practicality, NATO fabric or Tropic rubber. The satin-finished steel case requires materials that complement without competing visually.

Position the watch face-up. Locate the two attachment holes on the case sides. Use a spring bar tool to push inward the small pin (lug pin) securing the strap. Once released, the strap slides out. Repeat on the other side and install the new strap by reversing the procedure.

Yes, absolutely. A quality aftermarket strap maintains or enhances the watch. It is essential to select the correct lug width (13 millimetres) and material that respects the proportions of the 26-millimetre case. Milano Straps offers handcrafted straps carefully selected for this reference, with bespoke creation available at Casati Milano atelier.

Durability depends on tanning and usage. An alligator or vegetable-tanned calf strap lasts 3–5 years with daily wear, developing desirable patina. Shell cordovan exceeds 10 years due to superior fibre density. Natural wear (friction, moisture, perspiration) is part of the strap's character. Casati Milano straps include 18-month warranty and can be restored.