Tudor · Black Bay

Strap for Heritage Black Bay Blue Manufacture / Strap

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
Reference79230B-0007 (aka: M79230B-0007, 79230B0007)
FamilyBlack Bay
MovementTudor caliber MT5602 hours, minutes, seconds | chronometer
Year2018
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 79230B-0007 (aka: M79230B-0007, 79230B0007)

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Black Bay 79230B-0007 (aka: M79230B-0007, 79230B0007), seen from the bench

The Black Bay represents Tudor's collection of diver's watches, equipped with the automatic MT5602 movement certified as a chronometer. The watch has hour, minute and second functions with a Tudor in-house movement. The case features 22mm lugs for the strap.

Frequently asked questions

What is the exact lug width of the Tudor Black Bay 79230B-0007?

The lug width of the Tudor Black Bay 79230B-0007 is exactly 22 millimetres. This is the internal distance between the two lugs where the strap is inserted. To verify compatibility, measure the space between the inside of the lugs: it must be precisely 22 millimetres. Any strap designed for this width will fit without gaps or excess material.

What is the best strap for the Tudor Black Bay 79230B-0007?

The best strap depends on usage: for diving, a premium NATO in Cordura or vulcanised rubber offers lightness and reliability; for formal daily wear, an alligator with vegetable tanning or Japanese shell cordovan adds elegance without compromising robustness. The midnight blue bezel pairs naturally with straps in caramel, dark brown, or deep black tones. Avoid excessive colour contrasts that compete with the dial.

How do I change the strap on the Tudor Black Bay 79230B-0007?

The Tudor Black Bay 79230B-0007 uses straight spring bars compatible with any standard 22mm strap. Remove the current strap by gently extracting the spring bars from their slots using a spring bar tool. Insert the new bars into the lugs, ensuring they are properly positioned. If the strap features a deployant clasp, secure the safety mechanism to the case. The operation takes a few minutes and requires no specialist skills.

Are aftermarket straps compatible with this Tudor model?

Yes, any standard strap with a 22-millimetre lug width is fully compatible with the Tudor Black Bay 79230B-0007. This includes leather, NATO, rubber, textile straps, and models with deployant clasps. Simply ensure the width is exactly 22mm: undersized (20mm) or oversized (24mm) straps will create unsightly gaps or fail to insert correctly.

How long does a leather strap last on a Tudor Black Bay 79230B-0007?

The lifespan of a leather strap depends on frequency of use and maintenance. An alligator or vegetable-tanned calf strap, worn daily, typically lasts 18–24 months before showing visible wear (scuffing, altered patina, fibre loss). With occasional use or rotation between straps, durability extends beyond 3 years. Vulcanised rubber, by comparison, resists 2–4 years; Cordura NATO 4–6 years. Regular maintenance (cleaning, conditioning with natural balms) significantly extends strap life.

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