Tudor · Black Bay One

Strap for Black Bay 36 S&G - Diamond / Silver / Bracelet

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
Reference79653-0002 (aka: M79653-0002)
FamilyBlack Bay One
MovementTudor caliber MT5400 Hours, Minutes, Seconds | Chronometer
CaseYellow Gold, Stainless Steel

Spring bar

Spring bars for Tudor

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

The Black Bay One 79653-0002 (aka: M79653-0002), seen from the bench

The Black Bay One represents a limited edition timepiece from the Tudor Black Bay collection. It mounts the automatic MT5400 caliber with chronometer certification and indication of hours, minutes and seconds. The watch features 19mm lugs for the strap.

Frequently asked questions

What is the lug width of the Tudor Black Bay One 79653-0002?

The lug width of the Tudor Black Bay One 79653-0002 is 19mm. This measurement represents the distance between the inner lugs where the strap attaches to the case. The 19mm width is perfectly proportioned to a 36mm case, following the classical canon of European watchmaking.

Which strap is best suited for the Tudor Black Bay One 79653-0002?

For the Black Bay One 79653-0002, we recommend a strap in medium brown alligator or shell cordovan: both enhance the two-tone gold/steel case without visual competition. Alternatively, a classic black leather is versatile for any occasion. Your choice depends on usage: for formal wear, choose alligator or cordovan; for daily use, select leather or rubber.

How do I change the strap on my Tudor Black Bay One?

Position the watch on a stable surface with the case facing down. Use a spring bar tool to gently press the spring pin that holds the strap, inserting the tip into the lateral slot of the lug. Remove the old strap from the first side, then the other. Insert the new strap in the same way, ensuring the springs snap perfectly into the lugs.

Can I use a compatible 19mm aftermarket strap on my Tudor Black Bay One?

Yes, absolutely. Any strap with a 19mm lug width is compatible with the Black Bay One 79653-0002. You can choose from certified aftermarket brands or opt for bespoke handcrafted straps. The important thing is to verify that the width is exactly 19mm to ensure a secure and stable attachment.

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

A quality leather strap, such as alligator or shell cordovan, typically lasts 3-5 years with daily use. Durability depends on tanning method, environmental humidity, and maintenance frequency. Vegetable-tanned leather tends to age nobly, while chemically-treated leather may lose elasticity faster. Regular maintenance (conditioning 2-3 times yearly) significantly extends strap life.

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