Strap for Black Bay 36 S&G / Black / Bracelet

The lug width of the Tudor Black Bay One 79643-0001 is 19mm. This width is specific to the 36mm case in yellow gold and stainless steel, and represents the construction standard set by Tudor to maintain proportional harmony between the case and strap. Verifying that your replacement strap is compatible with 19mm lugs is essential to ensure proper pin insertion and optimal watch stability on the wrist.

For the Black Bay One 79643-0001, alligator leather represents the premier choice: its natural texture creates a sophisticated tactile contrast with the bicolour case. Alternatively, vegetable-tanned calf develops a patina that evolves over time, gaining character through controlled wear. Shell cordovan, with its structural rigidity and natural lustre, particularly enhances the yellow gold component of the case, though it requires more careful maintenance. For casual wear, a silk NATO or FKM rubber strap offers practicality without compromising the model's aesthetic rigour.

Strap replacement requires a specific tool called a spring bar removal tool. Procedure: 1) Place the watch on a soft surface with the caseback facing upward; 2) Insert the bifurcated tip of the tool into the hole adjacent to the lug; 3) Gently push downward to depressurise the spring pin tension; 4) Remove the pin completely; 5) Repeat for the second pin; 6) Insert the new strap, aligning the lug holes and pushing the pin until you hear a click. For those without proper tools or preferring professional service, the Casati Milano atelier offers strap replacement with precision verification.

All straps with 19mm lug width are compatible. MilanoStraps offers a dedicated collection of artisanal straps in various materials—alligator, vegetable-tanned calf, shell cordovan, woven NATO, FKM rubber—all customisable in length, initials and stitching thread. Compatibility is guaranteed by the standard 19mm lug width; build quality and hardware finish (particularly the deployant clasp) vary significantly between manufacturers. We recommend verifying that the strap is constructed with pins compatible with approximately 1.5mm diameter, the standard for the Black Bay One.

Leather strap durability depends on material, intensity of use and maintenance. Quality alligator or vegetable-tanned calf, with moderate daily wear, typically lasts 3–5 years before showing significant structural wear signs (thinning, creasing at fold points, or stitching failure). Shell cordovan, being stiffer, can exceed 6–7 years. Surface patina and controlled creasing are natural and desirable characteristics, not defects. Casati Milano atelier guarantees 18 months on stitching and structural integrity of any strap we create, with professional reconditioning available at cost beyond that period.