Strap for Flagship 40 Stainless Steel / Green / Bracelet

The lug width of the Longines Flagship L4.984.4.02.6 is 21mm. This measurement, taken between the two case lugs, is mandatory when selecting an aftermarket strap. Always verify this specification before purchase, as straps of 20mm or 22mm will not fit correctly.

For the Flagship L4.984.4.02.6, straps in cognac alligator, vegetable-tanned calf leather, shell cordovan, or robust textile in neutral tones are recommended. The stainless steel case deserves intentional materials: alligator enhances aesthetic sobriety with its distinctive rectangular grain, vegetable-tanned calf develops noble patina over time, shell cordovan offers exceptional durability and structural density.

Strap replacement involves removing the spring bars that connect the strap to the case. Use a dedicated strap removal tool to gently extract the spring bars from their seats, avoiding damage to the case finish. Insert the new strap by aligning the holes with the spring bars, then reposition the bars until the locking click is felt. If inexperienced, entrust the operation to a specialised atelier.

Yes, the Flagship L4.984.4.02.6 is fully compatible with aftermarket straps of 21mm lug width. Straps in leather, textile, rubber, and metal are available online or through specialised ateliers. Always verify the lug width specifications and, if possible, consult the terminal bar dimensions for optimal fit.

A quality leather strap—alligator, cordovan, or vegetable-tanned calf—has an average lifespan of 3-5 years with daily wear, accounting for exposure to moisture, perspiration, and sunlight. Vegetable-tanned leather develops patina and slight hardening, whilst shell cordovan lasts longer due to structural density. Regular gentle cleaning and dry storage extend useful life significantly.