Tudor · Black Bay

Strap for Heritage Black Bay Black Dark / Straight End 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
Reference79230DK-0001 (aka: M79230DK-0001, 79230DK0001)
FamilyBlack Bay
MovementTudor caliber MT5602 hours, minutes, seconds | chronometer
Year2016
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 79230DK-0001 (aka: M79230DK-0001, 79230DK0001)

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Black Bay 79230DK-0001 (aka: M79230DK-0001, 79230DK0001), seen from the bench

The Black Bay represents the modern reinterpretation of Tudor's 1950s dive watch models. It is equipped with the automatic caliber MT5602, officially certified as a chronometer, and indicates hours, minutes, and seconds. The lugs measure 22mm in width.

Frequently asked questions

What is the lug width of the Tudor Black Bay 79230DK-0001?

The lug width is 22 millimetres. This measurement is standard for professional diving watches and determines compatibility with aftermarket straps. Measure the distance between the internal lugs of the case to verify accuracy before ordering a replacement strap.

What is the best strap for the Tudor Black Bay 79230DK-0001?

There is no single best choice; it depends on your intended use and the character you wish to impart to the watch. For military authenticity, choose a black or navy blue NATO strap. For elegant everyday wear, consider alligator or vegetable-tanned calf in satin finish. For genuine diving use, vulcanised rubber with technical texture is ideal. For versatility, shell cordovan ages magnificently over time.

How do you change the strap on a Tudor Black Bay 79230DK-0001?

Position the watch carefully on a springbar tool. Locate the elastic pins that retain the strap at the case lugs. Press the pin gently from one side whilst pulling the old strap outward. Repeat on the opposite side. Insert the new strap, aligning its pins with the case holes, and press until the locking click is felt. Verify that both pins are fully seated before wearing the watch.

Is the Tudor Black Bay 79230DK-0001 compatible with 22mm aftermarket straps?

Yes, entirely. The 22-millimetre lug width is a widely-adopted standard, giving you access to a broad range of compatible straps from various manufacturers and materials. Always verify that your chosen strap is specifically dimensioned for 22 millimetres, as variants (20mm, 24mm) will not fit properly.

How long does a leather strap last on a Tudor Black Bay 79230DK-0001?

Durability depends on material quality and usage patterns. Alligator or vegetable-tanned calf, if properly maintained, will last 3–5 years of moderate daily wear. Shell cordovan can endure 7–10 years, developing an appealing patina. A thick-weave NATO strap resists wear for 5–7 years. Humidity, perspiration, and direct sunlight exposure reduce longevity. Rotating regularly between multiple straps extends the lifespan of each.

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