Strap for Conquest 29.5 Quartz Moonphase Stainless Steel / White / Bracelet

The lug width of the Longines Conquest L3.380.4.16.6 is 15mm. This measurement is critical for selecting a compatible strap and must be measured precisely between the two case lugs using a digital calliper. Never attempt to force a strap of different width, as this would damage the case.

For the L3.380.4.16.6 stainless steel case, alligator leather remains the premium choice, followed by vegetable-tanned calf and shell cordovan for those seeking evolved patina. For practicality, a NATO strap in quality technical nylon offers versatility and ease of maintenance. Technical rubber is the modern solution for those who prefer minimal upkeep. The choice depends on daily wear patterns and personal colour preference.

Strap change is performed using a spring bar tool: position the tool in the lateral slot of the inner lug, press gently to retract the spring, and once the lug is freed, extract the strap. The reverse process applies the new strap. If you lack experience, consult a professional to avoid scratching the case.

Yes, any strap manufactured to 15mm lug width is compatible with the Conquest L3.380.4.16.6, regardless of maker. Milano Straps offers a curated selection of 15mm straps in fine leathers (alligator, calf, shell cordovan) and technical materials, customisable to order. Compatibility is guaranteed if the measurement is precise.

The lifespan of a leather strap depends on tanning method, frequency of wear, and maintenance. A quality alligator or shell cordovan strap lasts 3–5 years with regular daily use, whilst vegetable-tanned calf typically lasts 2–3 years. Exposure to moisture and perspiration shortens lifespan. Milano Straps offers an 18-month warranty on straps from the Casati Milano atelier.