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

The Tudor Black Bay One reference 79613-0006 features a lug width of 16mm. This specific measurement is designed for compact watch cases (31mm diameter) and ensures correct visual proportion between the strap width and the case diameter. Measurement must be taken between the inner lugs that support the strap, not across the external case width.

We recommend alligator leather from vegetable tanning in dark shades (black, chocolate brown, burgundy) or shell cordovan in medium brown. Both materials emphasise the contrast between the stainless steel and yellow gold of the two-tone case. Avoid rubber or NATO straps, which conflict with the classical proportions and formal character of the watch.

You will need a specialised spring bar tool and basic technical knowledge. The tool extracts the two lateral pins that secure the strap to the lugs. If you lack the proper equipment, entrust the operation to a competent watchmaking laboratory: the yellow gold pins on the Black Bay One are fragile and mishandling could cause damage. Casati Milano offers this service with custom finishing.

Yes. The 16mm lug width of the 79613-0006 does not permit variations. Wider straps (18mm, 20mm) will not seat correctly, whilst narrower ones (14mm) will leave visible gaps. Always verify lug width before purchase. All 16mm straps on milanostraps.it are guaranteed compatible.

A high-quality alligator or vegetable-tanned shell cordovan strap lasts 3-5 years under daily wear. Durability depends on climate, frequency of use, and maintenance (avoid excessive moisture and dirt). Quality leather develops a natural patina that improves appearance over time. Casati Milano provides an 18-month warranty on all bespoke straps.