Tudor · Black Bay

Strap for Tudor Black Bay M79210CNU

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
FamilyBlack Bay
MovementTudor caliber MT5602-1U Hours, Minutes, Seconds | Chronometer

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

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Black Bay M79210CNU, seen from the bench

The Black Bay M79210CNU features a 41mm stainless steel case with a ceramic bezel and 22mm lugs. It is powered by the Tudor MT5602-1U automatic movement with chronometer certification and hour, minute and second functions. The watch belongs to the Black Bay collection of the British brand Tudor.

Frequently asked questions

What is the lug width of the Tudor Black Bay M79210CNU?

The lug width of the Tudor Black Bay M79210CNU is 22 millimetres. This measurement is taken between the lugs at the points where they attach to the case using a digital calliper. The 22mm specification makes the watch compatible with a wide range of aftermarket leather, rubber, and fabric straps.

What is the best strap for the Tudor Black Bay M79210CNU?

The optimal strap choice depends on your intended use and personal context. For formal elegance, we recommend an alligator strap in vegetable tanning with vertical grain or Tuscany calf leather that develops patina over time. For diving functionality, FKM or EPDM rubber in black maintains performance standards. A heavyweight cotton NATO strap suits summer wear and casual applications. All three materials complement the black dial and white gold indices of the M79210CNU.

How do I change the strap on the Tudor Black Bay M79210CNU?

Strap replacement on the M79210CNU requires a spring bar tool or small flat lever. Gently press the two lug shoulders inward towards the case centre to extract the spring bars. Once removed, align the new strap's holes with the case lugs and insert the spring bars carefully. The operation demands attention to avoid damaging the case and screw-down crown.

Is an aftermarket strap compatible with the Tudor Black Bay M79210CNU?

Yes, the Tudor Black Bay M79210CNU is fully compatible with quality artisanal aftermarket straps provided they conform to the 22mm lug width specification. milanostraps.it stocks a curated selection of certified 22mm straps in leather, rubber, and fabric, ready for dispatch. Casati Milano's atelier also offers bespoke strap creation with personally selected leathers.

What is the lifespan of a leather strap for the Tudor Black Bay M79210CNU?

A quality leather strap, whether in alligator or calf with vegetable tanning, typically lasts 3–5 years of daily or intensive wear, developing natural patina over time. Longevity depends on leather type, wearing conditions, and maintenance protocol. FKM or EPDM rubber straps last 4–6 years, whilst NATO fabric straps show visible wear after 2–3 years. Casati Milano's artisanal guarantee covers products for 18 months.

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