Strap for Elegant Collection Automatic 29 Stainless Steel / Pink Gold / White

The lug width of the Longines Elegant L4.310.5.12.7 is 20mm. This measurement is specific to this model and was calibrated by Longines artisans to perfectly balance the 29mm case diameter with the feminine proportions the timepiece is designed for. To verify the measurement, use a digital calliper in the internal strap grooves, parallel to the dial, measuring for at least 5mm of depth.

For the L4.310.5.12.7, straps in alligator, vegetable-tanned calf leather or shell cordovan are recommended. Alligator is the natural choice: its compact grain creates elegant contrast with the two-tone gold-steel case and develops a fascinating patina over time. Vegetable-tanned calf is ideal for intensive daily use, whilst shell cordovan offers initial softness and progressive rigidity. For those seeking practicality, NATO or FKM rubber straps guarantee durability without compromising elegance.

The L4.310.5.12.7 strap is changed by removing the spring bars from the lugs. Position the watch on a soft support, locate the small lateral hole on the lug, insert a dedicated tool (spring bar tool) to compress the pin and slide the old strap out of the lugs. Repeat on the other side. To install the new strap, insert the spring bars into the lugs and slide the strap until the pins snap into position. Verify that the strap is firmly secured and that lateral movement is minimal.

Yes, aftermarket straps with a 20mm lug width are fully compatible with the Longines L4.310.5.12.7, provided they respect this specific measurement. High-quality straps in vegetable-tanned leather, alligator or shell cordovan offer superior aesthetics and personalisation impossible with original straps. Ensure the strap is supplied with appropriate spring bars and that attachment to the lugs is precise, without lateral movement. Milanostraps.it offers a wide selection of 20mm compatible straps, customisable and ready for shipment.

The lifespan of a leather strap for the L4.310.5.12.7 depends on the material and usage. An alligator strap with vegetable tanning lasts 3-4 years in moderate daily use, developing a fascinating patina. Shell cordovan, being more durable, can last 5-6 years if properly cared for. Vegetable-tanned calf has a lifespan similar to alligator, approximately 3-4 years. To extend strap life, avoid direct water exposure and prolonged UV rays, clean regularly with a soft dry cloth and apply leather-specific conditioner every 6-8 months. The 18-month warranty offered by Casati Milano for custom straps covers manufacturing defects and material faults.