Tudor · Black Bay One

Strap for Heritage Black Bay 41 Blue / Fabric

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width22 mm
Case diameter41 mm
Reference79540-0010 (aka: M79540-0010)
FamilyBlack Bay One
MovementTudor caliber T600 Hours, Minutes, Seconds
CaseStainless Steel

Recommended spring bar

Modern Tudor 22mm spring bars — factory specification

Technical match for lug width and diameter · lug 22 mm · Ø 1.8 mm

All Tudor spring barsOpen →

Straps for the Black Bay One 79540-0010 (aka: M79540-0010)

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Black Bay One 79540-0010 (aka: M79540-0010), seen from the bench

The Tudor Black Bay One 79540-0010 is a 41 mm stainless steel watch featuring the Tudor T600 automatic caliber, born from an exclusive Only Watch 2015 collaboration. The model showcases a bronze-gold bezel and a gradient dial that evoke mid-century military heritage. It has a 22 mm lug width and a display caseback revealing the movement.

Frequently asked questions

What is the lug width of the Tudor Black Bay One 79540-0010?

The Tudor Black Bay One 79540-0010 features a 22-millimetre lug width. This specification corresponds to the standard for mid-sized dress sports watches with a 41mm case and is compatible with the complete range of 22mm straps available online and at Casati Milano's atelier.

Which strap is most suitable for the Tudor Black Bay One 79540-0010?

We recommend alligator leather in brown or black for the Black Bay One 79540-0010, as it complements the bronze-gold bezel and sunburst dial beautifully. Vegetable-tanned calf leather is ideal if you desire natural patina development over time. For a sports-oriented approach, a cotton NATO strap echoes the model's military heritage. Each choice depends on intended use and aesthetic preference.

How do you change the strap on a Tudor watch with 22mm lugs?

Strap replacement requires a spring bar remover tool. Position the extractor beneath the lug and apply gentle lateral pressure until the spring bar disengages from its seat. Once removed, extract the old strap, position the new one by aligning the lugs with the holes, and reinsert the spring bar by pressing until the safety click engages. For valuable timepieces, we recommend professional service at Casati Milano.

Can you use an aftermarket strap on a Tudor Black Bay One 79540-0010?

Absolutely. The 22-millimetre lug width is industry standard and accommodates any strap constructed to this specification. The artisanal straps from milanostraps.it are engineered and tested for full compatibility with the Black Bay One and other Tudor and Rolex models in this category. Casati Milano warranty covers 18 months.

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

A quality leather strap constructed with vegetable tanning or traditional leather-working techniques typically lasts between 3 to 5 years with daily wear, depending on sun exposure, humidity, and frequency of use. An alligator strap tends to have extended longevity (5-7 years) due to the parallel fibre structure of the skin. Casati Milano offers reconditioning services and stitch replacement.

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