Tudor · Black Bay

Strap for Black Bay Ceramic Blue / Visa Cash App RB

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
ReferenceM79210CNU-0007 (aka: 79210CNU-0007)
FamilyBlack Bay
MovementTudor caliber MT5602-1U hours, minutes, seconds | chronometer
Year2024
CaseCeramic, Stainless 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 M79210CNU-0007 (aka: 79210CNU-0007)

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Black Bay M79210CNU-0007 (aka: 79210CNU-0007), seen from the bench

The Black Bay represents Tudor's diving line, equipped with the COSC-certified automatic caliber MT5602-1U. The movement offers hour, minute and second functions with extended power reserve. The case features 22mm lugs for the strap.

Frequently asked questions

What is the exact lug width of the Tudor Black Bay M79210CNU-0007?

The lug width of the Tudor Black Bay Ceramic M79210CNU-0007 is precisely 22 millimetres. This measurement represents the distance between the centres of the spring bar holes on either side of the case. It is essential to verify this dimension using a digital calliper before purchasing a replacement strap, as even a one-millimetre discrepancy will render the strap incompatible.

Which strap material pairs best with the Black Bay M79210CNU-0007?

The optimal choice depends on intended wear. For daily elegance, we recommend natural alligator or vegetable-tanned calf leather in deep black or military green, which accentuate the satin ceramic case. For aquatic activities and professional diving, a regenerated nylon NATO remains the most practical and reliable option, reversible and adjustable without requiring a deployant clasp. Genuine shell cordovan in black develops extraordinary patina over time, ideal for collectors seeking a personalised visual narrative.

How do I correctly change the strap on my Tudor Black Bay M79210CNU-0007?

Place the watch face-up on a soft cloth. Locate the spring bar attachment point on the left side (wrist side) and use a spring bar removal tool: a small lever or dedicated watchmaker's tool. Push the bar from left to right with smooth, controlled pressure—do not force. Once the bar is free, the old strap will slide away. To install the replacement, repeat the process in reverse, ensuring the bar is fully inserted and audibly clicks into position.

Are Milano Straps 22mm straps fully compatible with my Black Bay M79210CNU-0007?

Yes, all 22mm straps from Milano Straps are manufactured to certified tolerance standards and tested on this Tudor Black Bay generation. Each product is quality-checked prior to dispatch. We nonetheless recommend personally measuring your lug width with a digital calliper to eliminate any doubt. In the unlikely event of incompatibility, our customer service will arrange a replacement at no charge.

What is the typical lifespan of a leather strap on a watch of this calibre?

A full-grain leather strap with vegetable tanning retains structural integrity for 3–5 years of daily wear, depending on sun exposure, ambient humidity, and frequency of use. Natural leather is a living material that ages gracefully, developing distinctive patina. Regenerated NATO fabric typically lasts 5–8 years owing to its synthetic composition. Genuine shell cordovan, being natural cortex, achieves 5–7 years whilst maintaining superior elasticity. We recommend periodically rotating between straps to extend the useful life 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