Strap for Le Locle Power Reserve 39.3 Stainless Steel / Black / Bracelet

The lug width of the Tissot Le Locle T006.424.11.053.00 is 19 millimetres. This dimension is the space between the lugs of the case, where the strap connects via the spring bar. To verify it, use a digital calliper positioned perpendicularly between the lugs, measuring the internal distance. A 19mm strap fits perfectly without protrusion or gaps, maintaining the aesthetic balance of the watch composition.

The ideal strap depends on your usage. Alligator represents the premium choice, with pronounced grain and evolving patina over time. Vegetable-tanned calf offers homogeneous texture and superior resistance for daily wear. NATO in 18 oz cotton ensures robustness and easy replacement. Vulcanised rubber is the versatile solution for humid climates or extended physical activity. We recommend evaluating colour combinations: cognac brown for formal contexts, black for maximum versatility, navy blue for fluidity between office and casual wear.

To change the strap, remove the metal lugs from the old strap. The spring bars on the Le Locle are extracted gently from the case by inserting a small flathead screwdriver under the edge of the spring bar. Once the lugs are free, you can insert them into the new strap by aligning the holes. Verify that the lug is fully seated in the case and that the spring bar is firmly secured. If using a NATO strap, the procedure is even simpler: thread the fabric through the lugs without requiring metal component removal.

Yes, the Le Locle is fully compatible with certified artisanal straps of 19mm lug width. High-quality aftermarket straps, made with alligator, calf or vegetable-tanned leather, maintain the same dimensional tolerances as the Tissot case. Milanostraps offers a curated collection of 19mm straps tested on this reference. Avoid generic or inferior quality straps, which may not seat correctly in the case lugs.

The lifespan of a leather strap depends on the material and usage. A vegetable-tanned calf strap, subjected to moderate daily wear, lasts approximately 3–4 years before showing signs of structural failure. Alligator, being a denser leather, can exceed 5 years. Vulcanised rubber resists up to 4–5 years under physical stress conditions. Leather patina is evolutionary: brown develops darker, richer tones, while black tends to lighten slightly. To extend lifespan, apply protective wax every 6 months and allow the strap to breathe when not wearing the watch.