Strap for Presence Automatic 34.5mm Stainless Steel / White

The lug width of the Longines Presence L4.821.4.12.2 is 18 mm. This measurement must match exactly the width of the strap you intend to pair with it. To verify compatibility, measure the internal distance between the two lugs of the case using a digital calliper.

The best strap depends on your lifestyle. For formal and daily wear, we recommend cognac or black alligator, which enhance the compact proportions of the case. In more dynamic environments, an organic cotton NATO or a vegetable-tanned leather offers durability without aesthetic compromise. Shell cordovan represents the ideal synthesis between practicality and noble leather ageing.

The change requires a spring bar remover tool (available online) or the intervention of an expert watchmaker. Gently remove the spring bar springs to avoid scratching the case, extract the old strap, insert the new one by aligning the lug holes with the spring bars, then secure the springs by clicking into place. If you lack experience, consult a professional to avoid damage to the case.

Technically yes, but with caution. The 18 mm lug width is rare: most generic straps available are calibrated to standard sizes such as 20 or 16 mm. A generic strap might present construction tolerances that compromise retention or aesthetics. We recommend straps specific to 34.50 mm watches or bespoke artisanal straps tailored to measure, which guarantee construction quality and durability.

Durability varies based on material and use. A quality artisanal alligator or shell cordovan lasts 3 to 5 years with daily intensive use and regular maintenance. A robust calf leather lasts 2 to 4 years. A NATO or FKM rubber strap can last 4 to 6 years without deterioration. The patina of the leather is natural and increases aesthetic value over time; replacement becomes necessary when the strap loses elasticity or stitching fails. With Casati Milano's 18-month warranty, you are covered against construction defects.