Strap for Big Crown ProPilot Chronograph GMT Stainless Steel / Black

The lug width is 22mm, measured as the distance between the spring bar attachments on the case. To verify compatibility, measure with a digital calliper the space between the two pins: it must correspond exactly to 22mm. Inaccurate measurement risks installing straps that are too tight or unstable during wear.

For a tool watch of this calibre, we recommend vegetable-tanned Tuscan leather in Tobacco Brown. This material combines visceral robustness with the ability to evolve over time, developing a patina that amplifies the watch's character. Alternatively, dark alligator offers discreet elegance, whilst ballistic canvas NATO maintains the original military aesthetic.

Strap change requires a spring bar tool—a specific instrument that allows you to compress the attachments and release the strap from the case. Position the watch on a stable surface, insert the tool into the pin slot from the opposite side, compress with gentle pressure, and remove the old strap. Install the new one by aligning its holes with the pins and press until you feel the locking click. Always verify solidity before wearing the watch.

Yes, any strap manufactured for 22mm lug width is compatible with the ProPilot 01 677 7699 4164-07 8 22 19, provided that the spring bars used are of standard type with diameter and length conforming to the original Oris case attachments. Our handcrafted straps are manufactured to these specifications, guaranteeing total compatibility and reliable fastening.

Durability depends on intensity of use and climatic conditions. Vegetable-tanned Tuscan leather, subject to regular daily wear, maintains structural integrity and fastening functionality for 3–5 years. The leather will continue to develop patina even after this period. Prolonged water exposure or extreme humidity accelerates ageing cycles. Replacement is straightforward: a new strap of the same lug width installs in minutes.