Longines
Conquest L3.430.5.92.9— lug 17mm

The lug width is 17 mm, measured internally between the two anchor pins of the strap. This dimension is specified by the manufacturer and requires bespoke straps, as it does not fall within industrial standards (18 mm, 20 mm, 22 mm). To verify, use a digital calliper positioned horizontally between the lug holes.

For the Conquest L3.430.5.92.9, we recommend alligator in cognac or medium brown to complement the rose gold, or black alligator to emphasise the two-tone case contrast. For those seeking natural patina, vegetable-tanned calf in brown develops character marks that dialogue with the metal. For informal wear, dark grey cotton NATO offers practicality whilst maintaining elegance.

The strap is changed by removing the two horizontal pins that pass through the lugs. Use a spring bar tool: insert the tip into the slot beneath the pin, compress the internal spring, and extract the pin from the case. Repeat on the other side. Insert the new strap by aligning the hole with the pin and push until you hear the locking click. The operation requires care to avoid scratching the case.

Yes, provided the strap is constructed specifically for 17 mm lug width. Standard straps of 18 mm or larger will not insert correctly into the lugs. Always verify the exact dimension before purchase. Bespoke straps guarantee precise compatibility and superior construction quality compared to generic aftermarket options.

A quality alligator or calf strap has an average lifespan of 3–5 years with daily wear, varying according to humidity exposure, sunlight, and cleaning frequency. Naturally tanned leather tends to age by developing characteristic patina, which enhances perceived value aesthetically. Casati Milano guarantees 18 months on custom straps and provides restoration and buckle replacement services to extend the useful life of the piece.