Strap for Big Crown X1 Calculator Grey / Black

The lug width of this model is 23mm, a non-standard dimension that Oris specifically calibrated to maintain the visual proportions of the 46mm case. This measurement is taken between the inner attachment pins, not the external distance. It is essential to verify this dimension before purchasing an aftermarket strap.

For this Swiss chronograph, we recommend a high-quality alligator for understated elegance, or vegetable-tanned calf leather that develops patina over time. NATO straps in synthetic fabric maintain the military heritage, whilst rubber with deployante buckle is ideal for daily wear and water exposure. Your choice depends on context and personal aesthetic preferences.

Remove the attachment lugs by gently pushing the spring bars from the opposite side using a flat tool (spring bar tool). Align the new strap's holes with the pins, then push the bars into their housings until you hear the locking click. Ensure both bars are firmly seated before wearing. If unsure, consult a professional watchmaker.

Yes, provided it is specifically dimensioned for 23mm lug width. Milanostraps offers a complete collection of bespoke, handcrafted straps compatible with this model, ready for shipment. Always verify that your chosen strap respects the 23mm width to ensure perfect fit at the case sides.

A quality leather strap on regularly worn timepiece lasts approximately 3–5 years. Vegetable-tanned leather develops characteristic patina and improves aesthetically, though it remains more delicate if exposed to constant humidity. Rubber sports straps or NATO options offer greater durability in harsh environments. Rotating between straps extends the lifespan of each.