Strap for Conquest Heritage Power Reserve 38 Yellow Gold / Silver

The lug width of the Longines Conquest Heritage L1.648.6.78.2 is 19 millimetres. This measurement represents the distance between the two attachment holes on the case where the strap is secured. It is important not to confuse this measurement with the case diameter (38 mm) or the total case width (approximately 48 mm). The 19 mm lug width is non-standard and requires a specific search for compatible straps.

For the Conquest Heritage in yellow gold, we recommend straps in alligator leather (cognac or dark brown) for elegant contrast with the precious metal. Shell cordovan offers uniqueness through its evolving patina over time. Vegetable-tanned calf leather represents a versatile and durable option, suitable for both formal and sporting contexts. For those seeking practicality, structured rubber or heavy cotton NATO straps confer a more athletic character whilst maintaining stylistic coherence with the original design.

Changing the strap is a straightforward operation: position the watch on a stable surface, access the attachment pins (located beneath the lugs) using a spring bar tool (a specific implement with a forked end). Gently push the pin towards the centre to free one end of the strap, then remove the old strap. Insert the new strap by aligning its holes with the pins, then push the pin again to secure it firmly. Verify that the strap is securely anchored before wearing the watch.

Yes, an aftermarket strap can be used provided it complies with the 19 millimetre lug width. Many universal straps are available in standard sizes (16, 18, 20, 22 mm), so it is essential to verify compatibility before purchase. Artisanal made-to-measure straps offer the most precise solution, allowing customisation in terms of material, colour, stitching thread and personalised length according to wrist proportions.

The lifespan of a leather strap depends on the material, frequency of use and environmental conditions. A high-quality artisanal alligator or shell cordovan strap, with daily use, has an average lifespan of 3-5 years before replacement is needed. Vegetable-tanned calf leather typically lasts 2-4 years. Exposure to excessive moisture, direct heat or constant perspiration reduces longevity. Regular maintenance (cleaning with a damp cloth, air drying) and alternating with other straps significantly extend the strap's useful life. Artisanal straps often include warranty (18 months at Casati Milano) covering manufacturing defects.