Strap for Black Bay 39 S&G / Silver / Bracelet

The lug width of the Tudor Black Bay One 79663-0002 is 20mm. This measurement corresponds to the distance between the lugs (case horns) where the strap attaches. It is critical to verify this dimension with a calliper before purchasing an aftermarket strap, as this specification is not standard across all timepieces.

For the yellow gold and stainless steel bicolour case of the Black Bay One, we recommend an alligator strap in cognac, a vegetable-tanned calf leather in dark brown, or shell cordovan in deep burgundy. These materials naturally complement both metals of the case without visual hierarchy. The choice of colour and texture should reflect the intended wearing context.

Changing the strap requires a spring bar tool. Place the watch on a stable surface, locate the horizontal pins at the extremities of the lugs, and gently press inward with the tool to release the pins from their seating. Once extracted, the original strap detaches easily. Align the new strap's holes with the pins, then use the tool to snap the pins back into position. Verify that both pins are fully seated before wearing the watch.

Yes, a curated selection of 20mm aftermarket straps is available for the Black Bay One. This lug width, though not universal, accommodates straps in alligator, calf leather, shell cordovan, coloured leather, NATO, and technical rubber. Online collections offer ready-to-ship options, customisable in length, monogram initials, and thread colour.

The durability of a leather strap depends on material type and usage patterns. A quality alligator strap can last 8–12 years with proper care. Vegetable-tanned calf develops patina over 5–10 years of wear. Shell cordovan, owing to its dense fibre structure, can exceed 12–15 years of service. Prolonged exposure to humidity and direct sunlight accelerates ageing. An 18-month warranty covers manufacturing defects.