Tudor · Black Bay One

Strap for Black Bay 36 S&G - Diamond / Black / 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
Reference79653-0001 (aka: M79653-0001)
FamilyBlack Bay One
MovementTudor caliber MT5400 hours, minutes, seconds | chronometer
Year2022
CaseYellow Gold, Stainless Steel

Spring bar

Spring bars for Tudor

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

Straps for the Black Bay One 79653-0001 (aka: M79653-0001)

Selected for the 19 mm lug width

All 19 mm straps →

The Black Bay One 79653-0001 (aka: M79653-0001), seen from the bench

The Black Bay One represents a unique piece created by Tudor for Only Watch 2015. It features the automatic MT5400 caliber with chronometer certification and hours, minutes, and seconds functions. The watch has 19mm lugs and is a special version of the Black Bay collection.

Frequently asked questions

What is the lug width of the Tudor Black Bay One 79653-0001?

The lug width of the Tudor Black Bay One 79653-0001 is 19 mm. This specific dimension represents the space between the two fixed lugs on the case where the strap must be inserted. Always measure this distance directly on your case to avoid purchasing errors, as it corresponds to the internal width of the strap lugs.

What is the best strap for the Tudor Black Bay One two-tone gold and steel model?

For the two-tone Black Bay One 79653-0001, roasted or dark brown alligator is the choice of maximum elegance, as the scale texture naturally dialogues with the gold and steel bicolour. Alternatively, vegetable-tanned calf leather offers suppleness and develops character as it ages, whilst vulcanised rubber guarantees practicality whilst maintaining impeccable proportions.

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

To change the strap, position the watch on a soft surface with the case facing downward. Use a dedicated spring bar tool to gently retract the internal springs (spring bar) located at the sides of the lug. Once both ends are released, the old strap slides away. Insert the new strap by aligning the lug holes with the case lugs and reinsert the spring bars until they click into place.

Can I use an aftermarket strap on the Tudor Black Bay One 79653-0001?

Yes, provided the strap has lugs compatible with the 19 mm lug width. High-quality artisanal straps offer superior ergonomics and durability compared to OEM substitutes. Ensure that the lugs are made of leather, steel or technical fabric suitable for resistance and that the thickness does not prevent proper closure of the buckle or deployant.

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

The lifespan of a leather strap depends on intensity of use, material and ambient humidity. A quality alligator or calf leather worn daily maintains structural integrity between 3 and 5 years. Vegetable-tanned leather tends to age better, developing a rich patina; vulcanised rubber offers greater durability (7–10 years). Regular maintenance—drying after water contact, protection from excessive heat—significantly extends the useful life of the strap.

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.

Request an appointment →

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