Strap for Big Crown Original Pointer Date 40 Stainless Steel / Black

The lug width of the Oris Big Crown 01 754 7543 4064-07 5 20 53 is precisely 20 millimetres. This dimension is critical for strap compatibility: the distance between the integrated lugs on the case must correspond exactly to 20mm. Using a calliper to verify this measurement is the most reliable method before purchasing an aftermarket strap.

For the Big Crown, straps in premium materials that respect the aviator aesthetic are recommended. An alligator strap with vegetable tanning or shell cordovan enhances the watch's heritage character, developing patina over time. For sporty use, structured calf leather offers practicality without sacrificing elegance. In humid environments or outdoor activities, vulcanised rubber or NATO Cordura straps provide maximum durability and resistance.

The procedure requires a dedicated tool, typically a spring bar tool or a specific strap removal device for watches. Position the watch on a soft surface, locate the pins connecting the strap to the lugs (usually on the underside of the case) and remove the old strap by applying controlled pressure. Insert the new strap ensuring the pin passes completely through both lugs before securing it. If inexperienced, consult a certified watchmaker to avoid damage to the case.

Yes, all straps with a 20mm lug width are compatible with the Big Crown. Milano Straps offers a curated selection of artisanal straps at this size: in quality leather, NATO, structured rubber and specialties such as alligator and shell cordovan. Compatibility is guaranteed provided the lug width corresponds exactly to 20 millimetres. Always verify specifications before purchase.

Durability varies depending on the material chosen and intensity of use. A structured calf strap lasts an average of 18–24 months of daily wear. Shell cordovan can exceed 3 years with proper maintenance (regular cleaning, protection from prolonged moisture). Alligator, being more resistant by nature, achieves 2–3 years. Longevity increases significantly if the watch is worn on rotation with other straps, reducing stress on the leather.