Tudor · Black Bay

Strap for Heritage Black Bay Bronze / Slate / Textile

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-0002 (aka: M79250BA-0002)
FamilyBlack Bay
MovementTudor caliber MT5601 Hours, Minutes, Seconds | Chronometer
CaseBronze, Stainless Steel

Spring bar

Spring bars for Tudor

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

The Black Bay 79250BA-0002 (aka: M79250BA-0002), seen from the bench

The Black Bay is powered by the Tudor MT5601 automatic movement with chronometer certification, offering hours, minutes and seconds indication. The case features 23mm lugs for the strap. The movement guarantees chronometric precision to COSC standards.

Frequently asked questions

What is the lug width of the Tudor Black Bay Bronze 79250BA-0002?

The Tudor Black Bay Bronze 79250BA-0002 features a lug width of 23 mm. This measurement is specific to this model and determined by the case lug geometry. To verify it yourself, measure the distance between the spring bar holes using a digital calliper positioned on the inner surface of the lug. This dimension is essential for selecting compatible straps.

Which strap is most suitable for the Tudor Black Bay Bronze 79250BA-0002?

The ideal strap depends on intended use and desired aesthetics. A vegetable-tanned alligator strap complements the bronze's natural patina development, creating harmoniously evolved wear. For a professional appearance, full-grain calf leather with natural grain offers understated elegance. A grey-dark or navy NATO maintains the watch's military heritage, whilst black FKM rubber suits aquatic activities. Choice must balance proportions—23 mm is substantial, requiring structured straps—and desired patina progression.

How do I change the strap on the Tudor Black Bay Bronze 79250BA-0002?

Strap changes require a simple tool: a spring bar tool (a small metal implement with two prongs). Position one prong in the spring bar hole on one lug side and apply light pressure toward the centre, creating tension in the spring bar itself. The strap will release easily. Repeat on the opposite side. When installing the new strap, ensure both spring bars are fully seated in their corresponding holes and the strap sits straight. If you lack the tool, Milano Straps can perform the swap during strap customisation.

Are aftermarket straps compatible with the Tudor Black Bay Bronze 79250BA-0002?

Yes, provided the lug width is exactly 23 mm. Not all generic straps of this width offer the execution quality or aesthetic appropriate to a watch of this standing. Milano Straps offers straps specifically curated for the 79250BA-0002, crafted in premium leathers (alligator, calf, shell cordovan) and customisable in sizing, monograms and stitching thread. The Casati Milano atelier additionally creates fully bespoke straps with direct material selection and personalised consultation.

How long does a leather strap last on the Tudor Black Bay Bronze 79250BA-0002?

Leather strap longevity depends on material and usage patterns. Full-grain calf, with ordinary care and periodic rotation amongst other straps, lasts 3–5 years before showing significant fatigue signs. Vegetable-tanned alligator typically endures longer due to its denser structure, reaching 5–7 years. Natural and FKM rubber maintain consistent performance for 5–10 years. Shell cordovan, if protected from excessive moisture, can exceed 10 years. Graceful ageing of leather is part of the desired aesthetic; when a strap shows buckle or stitch failure, the artisan can regenerate it.

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