Tudor · Black Bay

Strap for Heritage Black Bay Bronze / Slate / Leather

Takes 23 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width23 mm
Case diameter43 mm
Reference79250BA-0001 (aka: M79250BA-0001)
FamilyBlack Bay
MovementTudor caliber MT5601 hours, minutes, seconds | chronometer
Year2019
CaseBronze, Stainless Steel

Spring bar

Spring bars for Tudor

The right category for this model · choose the 23 mm size

The Black Bay 79250BA-0001 (aka: M79250BA-0001), seen from the bench

The Tudor Black Bay Bronze 79250BA-0001 features a 43mm bronze case with MT5601 certified chronometer movement maintaining ±2 seconds per day accuracy. The 23mm lug width accommodates the heritage maritime design descended from 1950s French Navy Submariner models. Water resistant to 200 meters, the watch develops a natural patina over time, transforming from copper tones to brown and smoked grey hues as part of its intentional design philosophy.

Frequently asked questions

What is the lug width of the Tudor Black Bay 79250BA-0001?

The Tudor Black Bay Bronze 79250BA-0001 features a precisely engineered 23-millimetre lug width. This measurement is specific to this case size and is not interchangeable with 20mm or 24mm lugs found on alternative models. To verify accurately, position the watch with the dial facing downwards and measure the inner distance between the two lugs in the central area where the strap sits stably.

Which strap type pairs best with the Tudor Black Bay 79250BA-0001?

Alligator leather represents the most elegant choice, particularly in dark brown or smoked grey tones that complement the developing bronze patina. Vegetable-tanned calf leather offers a sustainable alternative that develops its own patina parallel to the case. NATO fabric straps in technical weave are ideal for intensive use and aquatic activities. Shell cordovan imparts refined formality, whilst natural rubber remains the most performant solution for authentic diving environments.

How do I change the strap on my Tudor Black Bay 79250BA-0001?

Strap replacement occurs via the spring bar release mechanism located at the lug extremities. Employ a dedicated tool, typically supplied with the timepiece or available through specialist horologers. Push the spring bar inward to disengage it from the lug's groove, then slide the old strap outward. Insert the new strap ensuring the bars engage correctly, perceiving an audible 'click' of confirmation.

Can I use an aftermarket-compatible strap with the Tudor Black Bay 79250BA-0001?

Absolutely. Any strap engineered for 23mm lug width is compatible with the 79250BA-0001. Quality aftermarket straps permit greater customisation than official alternatives. We recommend engaging specialist manufacturers who guarantee precise tolerances (23±0.3mm) and verified materials, such as those available through established artisanal strap ateliers.

How long does a natural leather strap last on the Tudor Black Bay 79250BA-0001?

Longevity depends upon specific material and usage conditions. A high-quality alligator strap, subjected to regular maintenance (cleaning with damp cloth, conditioning with specialised creams every 6-12 months), may endure 5-8 years. Vegetable-tanned calf, being more absorbent, demonstrates slightly lower resistance (3-5 years). Exposure to direct sunlight, chlorinated water, and intense perspiration accelerate deterioration. NATO and natural rubber straps, being more technical materials, maintain integrity for 4-6 years of daily wear.

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