Strap for Black Bay Chrono 'Carbon 25'

The lug width of the Tudor Black Bay Chronograph M79377KN-0001 is 22 millimetres. This measurement is consistent across all versions of the Chronograph model, regardless of case material (titanium, stainless steel, or carbon). To verify correct strap compatibility, measure the distance between the inner edges of both lugs using a ruler; the value obtained must correspond to 22 millimetres.

The Tudor Black Bay Chronograph M79377KN-0001 performs optimally with straps in black or dark blue alligator, which enhance the technical aesthetics of the titanium and carbon case without creating visual conflict. For a more sporting and authentic interpretation, NATO fabric in black or navy blue represents an equally legitimate choice, consistent with the military lineage of the model. If you desire natural patina development, consider vegetable-tanned calf leather, which will acquire character over time.

To replace the strap, use a spring bar tool, available from jewellery retailers and authorised watch dealers. Position the tool's tip inside the lug and press gently downward to release the spring tension of the pin, then slide the pin out from within the lug. Repeat the operation on the opposite lug. When fitting the new strap, ensure the pin is fully seated in the lug aperture, confirming with a slight 'click'. If you prefer, request assistance from an authorised Tudor service centre.

Yes, professional-quality aftermarket straps manufactured specifically for the 22mm lug width are fully compatible with the M79377KN-0001. Milano Straps offers 22mm straps in alligator, calf, shell cordovan and NATO fabric, all available for immediate dispatch. The use of aftermarket straps incurs no loss of official warranty, provided the strap does not damage the case during installation.

Leather strap longevity depends on intensity of use and tanning quality. A professional-quality alligator or calf strap, subjected to daily wear, maintains structural integrity for 4–6 years; visual and tactile patina evolve naturally, enriching the strap's character. Frequent exposure to water, perspiration and direct sunlight accelerates ageing processes. A shell cordovan strap, thanks to the fibrous density of the material, can endure 8–10 years. Straps in NATO fabric or rubber possess virtually unlimited durability, being synthetic materials resistant to wear.