Strap for Elegant Collection Automatic 39 Stainless Steel / Red Gold / Black

The lug width of the Longines Elegant L4.910.5.57.7 is exactly 20 millimetres. This dimension is determined by the relationship between the case diameter (39mm) and the height of the lugs themselves. It is essential to verify this measurement with a digital calliper before ordering a strap, positioning the tool between the lug attachments without exerting pressure.

For this two-tone model (rose gold and stainless steel), cognac or deep burgundy alligator represents the most aesthetically coherent choice, particularly with brushed finishing. Alternatively, toasted vegetable-tanned calf or deep blue shell cordovan create balanced formal contrasts. If you prefer reversibility, a dual-sided deployante clasp (black/blue) allows chromatic changes without mechanical intervention.

Strap replacement requires a spring bar tool—a device designed to compress the springs at the attachments. Position the tool in the space between the lug and strap, press gently to release the spring, then extract the old strap. Insert the new one whilst keeping the lug horizontal and verify that the spring is seated at the attachments. If you are not experienced, the service at Casati Milano atelier offers guaranteed artisanal expertise.

Absolutely, if produced by certified artisans. Straps manufactured by milanostraps.it for the 20mm size guarantee complete mechanical compatibility with the Longines Elegant lugs, maintaining superior standards of stitching and finishing. The quality of materials (Sudanese alligator, European calf, shell cordovan) and artisanal precision ensure durability of twenty-four months and beyond.

A premium leather strap (alligator, shell cordovan, vegetable-tanned calf) used in rotation with at least two alternatives has an average lifespan of twenty-four to thirty-six months, with peaks of up to forty-eight months if subjected to regular maintenance (occasional cleaning, natural air-drying). The natural patina that develops over time enhances aesthetic appeal. The Casati Milano atelier provides an eighteen-month warranty on all personalised straps.