Tudor · Black Bay One

Strap for Heritage Black Bay 41 Silver / Bracelet

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
Reference79540-0011 (aka: M79540-0011)
FamilyBlack Bay One
MovementTudor caliber T600 hours, minutes, seconds
Year2021
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 79540-0011 (aka: M79540-0011)

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Black Bay One 79540-0011 (aka: M79540-0011), seen from the bench

The Tudor Black Bay One 79540-0011 is a limited edition of 100 pieces created in 2015 to commemorate the first anniversary of Only Watch. This 41 mm stainless steel case features a brushed and satin-finished dial with midnight blue tone and bordeaux bezel. The Tudor caliber T600 movement with coaxial escapement and Glucydur balance provides COSC-certified chronometry with over five days of power reserve. Ansa size: 22 mm.

Frequently asked questions

What is the lug width of the Tudor Black Bay One 79540-0011?

The <a href="/pages/termine-glossario/misura-ansa">lug width</a> of the Tudor Black Bay One 79540-0011 is 22mm. This dimension is specific to this model and determines compatibility with aftermarket straps. The lug width is measured in millimetres between the shoulder points of the case, at the exact point where the strap attaches to the watch.

Which strap is recommended for the Tudor Black Bay One 79540-0011?

For the Black Bay One 79540-0011, straps in superior <a href="/pages/termine-glossario/concia-vegetale">vegetable tanning</a> are ideal, particularly in dark brown or black tones. <a href="/pages/termine-glossario/alligatore">Alligator</a> represents a luxury alternative, while NATO cordura straps maintain a more sporting character. Material selection must balance the inherent elegance of the brushed case with a textile proposal that ages naturally.

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

Strap replacement on the 79540-0011 occurs through removal of the articulation pins (spring bars) from the case lugs. A dedicated spring bar tool is used to lift the pin ends and extract them from their seats. Once the lugs are freed, the previous strap can be removed and replaced with the new one. The procedure requires care to avoid damaging the lug shoulders.

Are compatible 22mm aftermarket straps available?

Yes. On milanostraps.it, a comprehensive range of <a href="https://milanostraps.it/collections/cinturini-orologi-per-misura-ansa-22mm">22mm straps</a> compatible with the Tudor Black Bay One 79540-0011 is available. Each strap is selected for construction quality and offers customisation options: leather selection, stitching colour, embroidered initials. Straps ship ready for use, with elasticity adjustment already calculated.

What is the lifespan of a natural leather strap for this watch?

A high-quality leather strap, subject to regular rotational use (not worn continuously without interruption), maintains structural integrity for 3–5 years. <a href="/pages/termine-glossario/concia-vegetale">Vegetable-tanned</a> leather ages naturally, developing a patina that increases aesthetic character. Wear depends on climate (humidity, perspiration), frequency of use, and care: periodic drying and occasional application of natural balm substantially extend the functional lifespan 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.

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