Strap for Black Bay 31 S&G - Diamond / Black / Bracelet

The lug width of the Tudor Black Bay One 79613-0001 is 16 millimetres. This measurement, smaller than the standard 20–22 millimetre range, reflects the ergonomic proportions of the 31 millimetre case and directly determines aftermarket strap compatibility. It is essential to verify that the chosen strap has terminals calibrated precisely to 16 millimetres to ensure correct fitment and aesthetic coherence.

The choice depends on intended usage and personal aesthetic preference. For formal wear, black alligator with cream silk stitching emphasises the yellow gold case without chromatic conflict. For daily use, vegetable-tanned calf offers versatility and develops natural patina over time. Shell cordovan represents a sophisticated alternative combining structural rigidity and chromatic depth. A silk-woven NATO in dark blue allows daily variability whilst maintaining sporty coherence with the chronometer-certified movement.

Strap replacement requires a specialised tool: a spring bar tool. Position the watch with one lug facing upwards, insert the flat tip of the spring bar tool into the side slot of the spring, apply gentle pressure to compress the spring, and slide the strap outward. Repeat for the other lug. When inserting the new strap, ensure the 16 millimetre terminals are perfectly aligned before releasing the spring. Avoid excessive pressure that could damage the leather.

Yes. Milano Straps supplies <a href="https://milanostraps.it/collections/cinturini-orologi-per-misura-ansa-16mm">16 millimetre straps</a> handcrafted and calibrated specifically for this lug width. Each strap is customisable in wrist measurements, leather colour, stitching thread type, and embossed initials. Casati Milano atelier additionally offers bespoke consultation services for leather selection and real-time updates via WhatsApp, with an 18 month warranty on construction.

Durability depends on material and intensity of use. Vegetable-tanned calf, worn daily, maintains structural and aesthetic integrity for 5–7 years; during this period it develops natural patina that increases appeal. Alligator, less prone to creasing, can last 7–10 years with regular maintenance (soft wiping and biannual conditioning). Shell cordovan, owing to its natural density, achieves 10–12 years of daily wear. A NATO in quality sustainable textile lasts 3–4 years under frequent use. Periodic maintenance—gentle cleaning with soft cloth, protection from standing water, annual conditioning—significantly extends strap life regardless of material composition.