Strap for Flagship 26 Automatic Stainless Steel White

The lug width of the Longines Flagship L4.274.4.12.6 is 18 millimetres. This measurement is specific to the model and follows the original design proportions established in 1957. To verify compatibility, measure the internal distance between the two lugs where the strap attaches to the case. On milanostraps.it you'll find a wide selection of customisable 18mm straps.

The best material depends on your intended use. For formal elegance, Nile crocodile with fine grain or shell cordovan offers exceptional patina and durability. For daily wear and comfort, vegetable-tanned calf leather provides softness and natural ageing. For humid or sporty environments, a robust nylon NATO or FKM rubber strap ensures grip and practicality. Your choice reflects your lifestyle.

Remove the strap using a spring bar tool. Position the flat tip of the tool under the lateral spring bar, push inward to release the spring, and gently withdraw the bar. Repeat on the other side. Insert the new strap by aligning the holes with the spring bars, then reinsert both bars until they click into place. If you lack a dedicated tool, Casati Milano offers professional strap changes with custom measurements.

Yes, the Longines Flagship is compatible with any aftermarket strap featuring an 18-millimetre lug width and correct thickness (typically 4–5mm). All straps on milanostraps.it in the 18mm collection are compatible. Always verify exact dimensions before purchase, as errors of even 0.5mm can compromise fit. Bespoke straps from Casati Milano are crafted to ensure perfect fit.

The longevity of a natural leather strap depends on material and usage. Shell cordovan, being extremely dense, lasts 5–7 years with daily wear and regular maintenance. Vegetable-tanned calf typically lasts 3–5 years. Alligator, thanks to its fibrous structure, achieves 4–6 years. Critical factors: humidity, frequency of wear, direct sun exposure and periodic cleaning. Casati Milano provides 18-month warranty on all bespoke straps, with regeneration options available.