Tudor · Black Bay One

Strap for Tudor Black Bay One 79653

Takes 19 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width19 mm
Case diameter36 mm
Reference79653
FamilyBlack Bay One
MovementTudor caliber MT5400 hours, minutes, seconds | chronometer

Spring bar

Spring bars for Tudor

The right category for this model · choose the 19 mm size

Straps for the Black Bay One 79653

Selected for the 19 mm lug width

All 19 mm straps →

The Black Bay One 79653, seen from the bench

The Black Bay One features a 36mm case made of stainless steel and yellow gold. It is equipped with the automatic Tudor MT5400 chronometer-certified caliber, which displays hours, minutes and seconds. The lugs measure 19mm in width.

Frequently asked questions

What is the lug width of the Tudor Black Bay One 79653?

The Tudor Black Bay One 79653 features a 19mm lug width, the standard measurement for mid-sized dive watches. This dimension refers to the distance between the inner holes where the spring bars (1.9mm diameter) are positioned. The 19mm width ensures compatibility with the vast majority of aftermarket straps available on the market, in both leather and rubber, without requiring professional adjustment.

What is the best strap for the Tudor Black Bay One 79653?

The optimal strap depends on intended use and aesthetic preference. For heritage-focused weearers, dark brown alligator leather creates perfect visual harmony with the gilt bezel and golden hour markers. Vegetable-tanned calf leather offers sustainability and natural patina development. For everyday versatility, a grey-blue nylon NATO or TROPIC rubber strap maintains dive functionality with practical daily wearability. Shell Cordovan represents the most sophisticated option for those who appreciate natural leather burnishing over time.

How do you change the strap on a Tudor Black Bay One 79653?

Remove the strap by using a spring bar tool to apply upward pressure on one of the bars located on either side of the case, creating enough space to extract it. Slide out the bar and strap, position the new strap, and reinsert the bar, confirming an audible click. Repeat on the opposite side. This is routine maintenance that requires no watchmaker intervention.

Which aftermarket straps are compatible with the Tudor Black Bay One 79653?

All straps featuring 19mm lug width and 1.9mm spring bars are compatible. This specification allows you to pair superior quality leathers compared to the original strap: alligator, Italian calf, shell cordovan, bovine leather, TROPIC rubber, silicone, and military NATO variants. Online collections dedicated to 19mm lug width offer extensive colour options and materials, customisable with initials and stitching thread choice.

How long does a leather strap last on a Tudor Black Bay One 79653?

Leather strap longevity depends on tanning quality, usage patterns, and maintenance. Premium-quality leather (alligator, shell cordovan, vegetable-tanned calf) lasts 3-5 years of daily wear with normal aging and occasional protective balm application. Rubber and NATO straps offer superior moisture and environmental resistance, making them ideal for dive use. Casati Milano provides an 18-month warranty on custom straps, covering manufacturing defects and stitching integrity.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only