Oris
Big Crown 01 403 7776 4083-Set— lug 19mm

The lug width is 19mm. This specification is critical when purchasing a compatible strap. To verify, measure the distance between the two lug holes on the case: it must be precisely 19mm. Straps sized at 18mm or 20mm will create unwanted play or insertion difficulties.

We recommend American alligator for those prioritising aesthetics and longevity, vegetable-tanned calf leather for a more classical, evolving appearance, silk-cotton NATO for versatility and practicality, or FKM rubber for sports-oriented use. Your choice depends on intended use and colour preference. All materials are available in 19mm configuration.

Remove the watch from your wrist. Position the Big Crown face-up on a soft surface. Use a spring bar removal tool to depressurise the lug spring. Insert the flat end of the tool into the small hole beneath the lug and push gently downward to release tension. Remove the old strap, insert the new one, and verify that the spring is positioned correctly.

Yes, provided the lug width is certified at 19mm. Third-party straps manufactured to this specification are fully compatible. Avoid generic compatibility claims (such as straps merely labelled "Oris 38mm"): always verify the nominal lug width. Our artisanal straps are engineered to tight tolerance for precise fit.

A quality leather strap (alligator or vegetable-tanned calf) typically lasts 3–5 years of daily wear before showing signs of wear at stitching and edge. Colour patina begins to manifest after 6–12 months. Humidity, direct sunlight exposure, and perspiration accelerate the natural cycle. Periodic maintenance with natural wax or strap-specific balm extends the useful life without altering the leather's character.