Tudor · Black Bay One

Strap for Heritage Black Bay 41 Silver / Brown Leather

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
Reference79540-0013 (aka: M79540-0013)
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 79540-0013 (aka: M79540-0013)

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Black Bay One 79540-0013 (aka: M79540-0013), seen from the bench

The Tudor Black Bay One 79540-0013 is a 41mm stainless steel sports watch featuring the Tudor T600 automatic caliber with 70-hour power reserve. Originally created for Only Watch 2015 in 79 pieces, it became available to the public. The dial is completely bare of hour indices, with essential hands only. The 22mm lug width accommodates generously proportioned straps in both artisanal and industrial options.

Frequently asked questions

What is the lug width of the Tudor Black Bay One 79540-0013?

The Tudor Black Bay One 79540-0013 features a lug width of 22 millimetres. This measurement, taken between the two lug pins, allows for straps of generous proportions that balance perfectly with the 41-millimetre case diameter. The 22-millimetre dimension is a professional standard that ensures access to an extensive range of bespoke and manufactured strap solutions.

Which strap should I choose for the Tudor Black Bay One?

For the Black Bay One 79540-0013, we recommend straps in superior leather, preferably vegetable-tanned. Alligator enhances the sportive-elegant character; Italian calf offers absolute comfort and develops a fascinating patina over time. For those seeking versatility, NATO fabric straps provide practicality, whilst structured rubber represents the ideal solution for intensive maritime and sporting pursuits. Avoid excessively rigid straps: this watch deserves materials that breathe and adapt to the wrist.

How do I change the strap on my Tudor Black Bay One 79540-0013?

To change the strap, obtain a spring bar removal tool. Gently insert the tool's tip into the recess beneath the lug to release the spring bar. Remove the bar completely, then extract the old strap. Position the new 22mm strap on the lugs, reinsert the bar ensuring it is perfectly secured on both sides. If you lack experience, a bespoke strap maker can perform this operation in minutes.

Are compatible aftermarket straps available for the 79540-0013?

Yes, numerous bespoke strap makers offer aftermarket solutions compatible with the 22mm lug width of the Black Bay One. Milano Straps maintains a dedicated collection of 22mm straps customisable in sizes, leather selection (alligator, calf, shell cordovan), colours and stitching finishes. For a fully bespoke experience, the Casati Milano atelier creates completely custom straps with personal leather consultation and an 18-month warranty.

What is the lifespan of a leather strap for a watch like the Tudor Black Bay One?

Lifespan depends on leather quality and usage patterns. A superior vegetable-tanned leather strap, such as those available from Milano Straps, has a useful life of 3-5 years with moderate daily use. Intensive use or frequent exposure to water and perspiration reduces this duration. The patina that develops over time is a sign of natural ageing, not deterioration. With appropriate care (drying after water exposure, avoiding prolonged sunlight), a vegetable-tanned leather strap can last considerably longer, developing increasingly pronounced vintage appeal.

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