Strap for Black Bay 36 Stainless Steel / Blue - Diamond / Bracelet

The lug width of the Tudor Black Bay One 79640-0005 is precisely 19.00mm. This measurement represents the linear distance between the two metal lugs (or spring bar holes) on the watch case where the strap attaches. A precise measurement using a digital caliper or metal ruler directly on the lugs confirms total strap compatibility. Never confuse this lug width with the case diameter (36mm): the lug width is the defining specification that determines strap fitment.

For the Tudor Black Bay One 79640-0005, the ideal choice depends on intended use and personal aesthetic preference. Dark brown or cognac alligator creates a sophisticated contrast with the black dial, perfect for formal contexts. Vegetable-tanned calf offers artisanal character and a patina that develops naturally with wear. For a more sporting profile, a canvas NATO or FKM rubber maintains the tool watch vocation. Shell cordovan, if proper maintenance is accepted, guarantees tactile density and unique lustre. All straps must feature 19mm lugs to fit perfectly on this model.

Changing the strap on a Tudor Black Bay One 79640-0005 requires minimal tools: a spring bar tool (or small screwdriver) and careful handling. Position the watch case-up, locate the metal lugs on either side where the strap attaches. Insert the spring bar tool into the protruding end of the spring bar, press gently to release internal tension, then extract the bar. Repeat on the opposite side. Align the new strap's lugs with the watch lugs and reinsert the spring bar from the opposite end until the click-lock engages. Avoid excess force that could deform the lugs.

Yes, any strap designed for 19mm lug width is fully compatible with the Tudor Black Bay One 79640-0005. Artisanal aftermarket straps offer distinct advantages: freedom of choice in materials (alligator, calf, shell cordovan, NATO), colour palettes, stitching thread, and customisations including initials or dates. Compatibility is guaranteed only if the strap is constructed for precisely 19.00mm lugs. Atelier Casati Milano specialises in bespoke straps for this specific model, with personalised updates and 18-month warranty.

Leather strap longevity depends on construction quality, leather treatment, and intensity of use. An artisanal strap crafted from premium materials (alligator, vegetable-tanned calf, shell cordovan) typically endures 3 to 5 years of moderate daily wear. If worn occasionally or rotated with other straps, lifespan extends to 7-10 years. Vegetable-tanned leather develops a natural patina over time, improving aesthetically. Critical factors include direct sun exposure, prolonged moisture, and salt perspiration. Preventative maintenance—periodic cleaning, light conditioning treatments—significantly extends service life. Atelier Casati Milano provides an 18-month warranty on all straps.