Strap for Conquest V.H.P. 43 Stainless Steel / Black / Rubber

The lug width of the Longines Conquest V.H.P. L3.726.4.56.9 is 22 mm. This dimension is determined by the 43 mm case diameter and ensures balanced proportions. The lug width corresponds to the linear distance between the two side lugs of the case, measured internally where the spring bar sits. A 22 mm strap is the only correct choice for this model: different widths risk damage to the case and incorrect access to the internal passants (lugs).

The ideal strap depends on intended use. For daily elegance, genuine alligator in testa di moro brown with vegetable tanning offers natural patina and tight regular grain. For versatility, vegetable-tanned calf in tortoise grey provides pronounced natural grain and dignified aging. For light diving activity or humid climates, vulcanised FKM rubber ensures secure grip and zero maintenance. For maximum colour-change freedom, organic canvas NATO allows colour variations without overall dissonance. Each choice reflects constructive coherence: the Conquest deserves authentic and well-finished materials.

Strap replacement is a delicate operation. Position the watch on a soft surface (microfibre cloth). Locate the spring bars (hidden under the lugs) at both ends of the case. Using a specialised tool (spring bar tool or dedicated implement), press downward on the free end of the spring bar on one side to retract it, then withdraw the old strap. Repeat on the other side. Insert the new strap by aligning the hole with the spring bar, press until you hear an audible click, repeat on the other side. Check that the strap is perfectly aligned with no play. If uncertain, entrust the operation to a professional service to avoid case damage.

Yes, a 22 mm strap is universally compatible with any watch that shares the same lug width (22 mm). However, geometric compatibility does not always guarantee aesthetic harmony. Total strap length may vary depending on case model and lug shape. The Conquest V.H.P., with its 43 mm case and balanced proportions, accommodates most quality 22 mm straps well. We recommend always verifying complete dimensions (lug width + total length) to ensure correct fit to your wrist.

Leather strap durability depends on material, use and maintenance. Genuine alligator with vegetable tanning, under average daily use and protection from excessive humidity, maintains integrity and grip for 3–5 years before reconditioning is needed. Vegetable-tanned calf has similar lifespan, with grain pleasantly softening over time. Vulcanised FKM rubber lasts 4–7 years if protected from prolonged direct sunlight and extreme heat. Organic canvas NATO lasts 5+ years if periodically laundered. Replacement is not urgent at first signs of wear: a well-constructed strap continues to function even with advanced patina. The Casati Milano atelier offers 18-month warranty on bespoke straps and reconditioning services.