Strap for Black Bay One 39 Stainless Steel / Champagne / Bracelet

The lug width of the Tudor Black Bay One in reference 79660-0003 is precisely 21mm. This measurement is determined by the distance between the two spring bar attachments located at the 12 and 6 o'clock positions on the case. It is essential to verify this dimension before purchasing an aftermarket strap to ensure perfect compatibility and prevent mechanical stress on the lugs.

The Black Bay One 79660-0003 pairs exceptionally with alligator straps (for a formal, luxurious interpretation), vegetable-tanned calf leather (for a narrative of natural patina), shell cordovan (for water resistance and brilliance), or NATO straps in canvas and nylon (for a purely functional and sporty reading). The choice depends on intended use and desired aesthetic context: premium leather for refined occasions, FKM rubber for intensive underwater wear.

The strap is changed by removing the two spring bar attachments at 12 and 6 o'clock using a small precision tool (spring bar tool). Position the flat blade beneath the spring bar ball, gently push inward to disengage the spring, then extract the attachment. Repeat on the opposite side. Insert the new strap by aligning the holes and reinserting the spring bars until you hear a click, verifying that both are firmly secured.

The water resistance of the watch (200 metres in the case of 79660-0003) is guaranteed by the case, the screw-down crown, and the sealed caseback, not by the strap. An aftermarket strap in any material does not compromise water resistance, but it is advisable to select treated leathers or FKM rubbers if frequent water contact is anticipated, since natural leather straps require periodic maintenance to preserve integrity and appearance over time.

The lifespan of a leather strap depends on material quality, type of tanning, and frequency of use. High-quality alligator or shell cordovan in vegetable tanning can last 4–6 years with proper maintenance (regular cleaning, drying, periodic conditioning). Vegetable-tanned calf leather generally lasts 3–5 years. FKM rubber straps last 5–7 years. An artisanal atelier strap with 18-month warranty offers superior construction reliability compared to standard industrial production.