Strap for Heritage Black Bay 41 Black / Fabric

The Tudor Black Bay One 79540-0009 features a lug width of 22 millimetres. This precise dimension ensures proper fit and alignment of the strap with the case lugs. You can verify this measurement using a digital calliper positioned between the two spring bars that secure the current strap.

For such an exclusive timepiece, we recommend a genuine alligator strap with traditional vegetable tanning, which develops a rich patina over time. Alternatively, a premium vegetable-tanned calf leather offers both robustness and elegance. For those preferring practicality, a vulcanised rubber or high-density nylon NATO strap in 22mm provides modern performance whilst maintaining aesthetic coherence.

Remove the two spring bars connecting the strap to the case lugs. Use a dedicated spring bar tool or small flathead screwdriver to carefully push the bars through from one side. Once removed, the old strap detaches. Insert the new 22mm strap and re-insert the spring bars until they are fully secured. Verify proper centring of the strap relative to the lugs.

Yes, any strap with a 22-millimetre lug width is compatible with the Black Bay One 79540-0009, provided the spring bar diameter is standard (typically 1.8mm). Always verify this specification before purchase. Bespoke straps allow customisation of length, buckle type (deployant or ardillon), and construction details.

Lifespan depends on material and usage patterns. A quality alligator strap with vegetable tanning and appropriate maintenance lasts 3-5 years in daily wear, developing desirable patina. Vegetable-tanned calf resists 4-7 years. Vulcanised rubber lasts 5-8 years. Regular maintenance—cleaning and conditioning with natural wax—significantly extends strap longevity. For a rare piece like the 79540-0009, proactive replacement is preferable to complete degradation.