Strap for Oris Big Crown 01 745 7688 4034

The lug width is 22 millimetres. This dimension is determined by the distance between the internal mounting lugs of the case. To verify, remove the current strap and measure with an internal calliper the distance between the attachment points. 22mm straps are the standard compatible specification for this Oris reference.

The choice depends on usage and personal aesthetics. For a formal approach, we recommend Tuscan alligator or vegetable-tanned calf leather, which creates visual contrast with the brushed steel case. For authentic aviator styling, a NATO strap in anthracite grey or navy nylon remains the most historically appropriate choice. For humid environments or water sports, FKM rubber offers superior practicality and durability.

Position the watch with the dial facing downward on a soft surface. Locate the spring bar pin passing through the upper lug; using a flat tool (spring bar tool), apply gentle perpendicular pressure to move the free end of the pin away from the hole in the case lug until it releases. Repeat for the lower lug. Remove the old strap and insert the new one by aligning the pins with the case holes, pressing firmly until you feel an audible click.

Yes, provided the lug width is exactly 22 millimetres. High-quality Swiss or Italian aftermarket straps do not compromise case integrity and allow you to completely transform the watch's aesthetic. Verify that the width is precise and that the material (leather, NATO, rubber) is robust and certified for structural compatibility with sports watches.

Durability depends on frequency of wear, climate and maintenance. A Tuscan vegetable-tanned leather strap, if worn daily in temperate conditions, lasts between 18 and 36 months before replacement is necessary. Exposure to perspiration, direct UV rays and rain accelerates wear. Alligator leather, due to its superior structural density, reaches 48-60 months. Quality nylon NATO straps exceed 5 years. Rotating between multiple straps significantly extends the longevity of each.