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

The Tudor Black Bay One reference 79603-0004 features a lug width of 16mm. This dimension is measured between the internal lugs of the case. It is essential not to confuse lug width with case diameter: the case is 31mm, but the lug width is 16mm, which determines strap compatibility.

For the two-tone 79603-0004 (yellow gold and steel), we recommend a dark brown alligator strap with vegetable tanning or burgundy shell cordovan. Both create elegant contrast without competing with the bi-metal case. Black smooth calf remains the minimalist choice. All these materials are available in Milano Straps' 16mm collection.

Changing the strap on the 79603-0004 is done using a spring bar tool: position the tool on the lower side of the pin, apply gentle pressure to compress the internal spring, remove the old pin, insert the new strap, and reinsert the pin. We recommend performing this operation on a soft surface to avoid damaging the case.

Yes, the 79603-0004 is fully compatible with 16mm aftermarket straps. Milano Straps offers a comprehensive collection of artisanal straps in various leathers, from crocodile to shell cordovan. The important thing is to verify the correct lug width measurement before purchase.

The lifespan of a leather strap depends on the material and usage. A high-quality artisanal alligator or shell cordovan strap lasts 5-8 years with regular use, developing a characteristic patina. Calf is more subject to wear, typically 3-5 years. Vegetable tanning ensures greater longevity than chrome tanning. Milano Straps offers an 18-month warranty on all bespoke straps.