Strap for Black Bay 39 S&G - Diamond / Champagne - Diamond / Bracelet

The lug width of the Tudor Black Bay One 79673-0007 is 20 millimetres. This measurement represents the space between the two lugs of the case and is essential for selecting a compatible strap. Always verify the distance between the inner walls of the lugs physically before ordering to exclude confusion with other model variants.

For the Black Bay One 79673-0007 two-tone gold/steel version, we recommend alligator leather in dark shades (black or dark brown) as the primary choice, as it creates visual continuity with the steel bezel without competing with the yellow gold. Alternatively, vegetable-tanned calf with natural patina or shell cordovan for formal occasions. The choice depends on primary use: sports, daily, or occasional wear.

To change the strap, use a spring bar tool to gently compress the elastic pin that secures the strap to the lugs. Position the tool in the small groove of the lug, compress the pin, and lift the strap. Repeat on both sides. If you lack experience, the Casati Milano atelier performs the operation by appointment, ensuring maximum precision.

Yes, any strap with a 20-millimetre lug width is compatible. However, to preserve the quality and aesthetics of the two-tone Black Bay One, we recommend artisanal leather straps of superior quality (alligator, cordovan, vegetable-tanned calf) over generic straps. The choice of material and colour significantly influences the final character of the watch.

The lifespan of a leather strap depends on the material and use. High-quality alligator or shell cordovan, worn daily, maintains structural integrity for 4–6 years, though natural patina evolves over time. Vegetable-tanned calf, more delicate, tends to wear more rapidly (2–4 years) if frequently exposed to moisture. The Casati Milano guarantee on artisanal straps covers 18 months of ordinary use.