Strap for Black Bay 36 S&G / Champagne - Diamond / Bracelet

The lug width of the Tudor Black Bay One M79643-0008 is 19 millimetres. This measurement represents the distance between the internal attachment points of the case where the strap connects. Accurate measurement of this dimension is essential when ordering a compatible strap, as even a 1mm difference compromises fitting. For precise verification, we recommend using a digital calliper or consulting a professional watchmaker.

The optimal strap choice depends on intended use and aesthetic preferences. For maximum formal elegance, we recommend vegetable-tanned alligator in dark cognac or deep black tones, which enhances the yellow gold and stainless steel case combination. For versatile daily wear, box calf in cognac or ebony offers durability and an evolving patina over time. Those seeking exceptional mechanical resistance may consider shell cordovan. For sporty applications, heavy canvas NATO or premium rubber ensure pure functionality. Your choice should reflect the primary context of strap use.

Changing the strap on a Tudor Black Bay One 79643-0008 requires a specialised tool called a spring bar tool. The procedure involves inserting the thin tip of the tool into the lateral holes of the spring bar that connects the strap to the case, applying gentle pressure to release the lug. Extract the old strap and insert the new one, aligning the holes carefully. If you lack experience, we recommend consulting a watchmaker or the Casati Milano service to prevent case damage.

Yes, any quality strap with a 19mm lug width is compatible with the Tudor Black Bay One 79643-0008. At milanostraps.it you will find a curated selection of artisanal straps in various materials (alligator, calf, shell cordovan, rubber) all calibrated for this measurement. Always verify that the strap is labelled as 19mm and that the total length is appropriate for your wrist (measurable by a watchmaker or calculable based on anatomical specifications).

The lifespan of a leather strap depends on material quality, intensity of use, and maintenance practices. A quality alligator or calf with vegetable tanning, used moderately, typically lasts 3–5 years before showing significant wear signs. Shell cordovan, thanks to its superior density, can reach 5–7 years of service. Intensive use, prolonged sun exposure, and humidity accelerate ageing. Casati Milano warrants its straps for 18 months and recommends periodic conditioning with strap-specific creams to extend longevity.