Strap for Elegant Collection Automatic 39 Stainless Steel / White / Bracelet

The lug width of the Longines Elegant L4.910.4.12.6 is precisely 20 millimetres. This measurement is crucial for identifying compatible watch straps and must not be confused with the case diameter (39mm). You can verify compatibility by measuring the internal distance between the two lugs with a digital calliper.

Black alligator with vegetable tanning represents the most coherent choice aligned with the dressy philosophy of the watch. Alternatively, dark brown calf leather with natural patina offers versatility for daily wear. For informal contexts, grey cotton NATO maintains constructive elegance. We advise against rubber or silicone, as these would betray the aesthetic intention of the piece.

The strap is secured via a stainless steel bar that runs through the lug pins. Use a spring bar tool to gently compress the spring mechanism and slide the bar out of the lugs. Once the old strap is removed, insert the bar into the new strap, ensuring the spring is correctly positioned before sliding into the watch lugs.

Yes, absolutely. Any strap with a 20mm lug width is mechanically compatible. milanostraps.it offers bespoke leather straps at 20mm, customisable in leather type, length, and stitching thread. The only precaution is to verify that the strap has been measured correctly before purchase and that construction quality is sufficient to reflect the elegance of the watch.

Durability depends on the tanning method, frequency of use, and maintenance. Vegetable-tanned alligator can last 5–8 years with daily wear, developing appealing patina. Calf leather typically lasts 3–5 years. Shell cordovan, owing to its constructive density, exceeds 10 years. Prolonged exposure to moisture or sunlight accelerates ageing. We recommend rotating between at least two straps to extend the useful life of each.