Tudor · Black Bay Chronograph

Strap for Tudor Black Bay Chronograph 79350

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
Reference79350
FamilyBlack Bay Chronograph
MovementTudor caliber MT5813 hours, minutes, small seconds | date | Chronograph, column wheel | 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 Chronograph 79350

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Black Bay Chronograph 79350, seen from the bench

The Black Bay Chronograph reference 79350 features the in-house MT5813 caliber with column-wheel and chronometer certification. The stainless steel case measures 41mm in diameter with 22mm lugs. The movement offers hours, minutes, small seconds, date, and chronograph function.

Frequently asked questions

What is the lug width of the Tudor Black Bay Chronograph 79350?

The Tudor Black Bay Chronograph 79350 features a lug width of 22mm. This measurement is specific to this model and ensures precise strap compatibility. To verify correct measurement, use a digital calliper to measure the distance between the inner lug shoulders: the value should fall between 21.8 and 22.2mm.

Which strap material is recommended for the Tudor Black Bay Chronograph 79350?

For the 79350, we recommend three primary options depending on use case: alligator for formal contexts (with elegant grain pattern), vegetable-tanned or racing calf for versatile daily wear (developing natural patina over time), vulcanised rubber or high-density cotton NATO for sport and maritime applications. Each material creates distinct personality whilst maintaining aesthetic coherence with the 41mm case.

How do I change the strap on the Tudor Black Bay Chronograph 79350?

The 79350 employs a standard spring bar system. Proceed as follows: use a dedicated spring bar tool to gently push the spring inward from the top of the lug, releasing the strap from the lug shoulder. Repeat for the opposite side. To fit the new strap, insert the bar ends into the lug shoulders and press the spring bar until you hear the engagement click. Verify the strap is securely fastened before wearing the watch.

Can I use an aftermarket compatible strap on my Tudor Black Bay Chronograph 79350?

Yes, any strap featuring a 22mm lug width is compatible with the 79350. High-quality aftermarket straps—whether crafted in alligator, calf, shell cordovan or rubber—offer superior aesthetic and tactile personalisation compared to the original strap. Always verify correct lug measurement (21.8–22.2mm) to prevent mechanical stress on the lugs.

How long does a leather strap last on the Tudor Black Bay Chronograph 79350?

Longevity depends on material quality and intensity of use. A high-quality alligator or calf strap lasts 3–5 years with moderate daily wear, developing natural patina if produced with vegetable tanning. Vulcanised rubber demonstrates superior longevity (7–10 years) but exhibits less aesthetic transformation. Leather deteriorates more rapidly if exposed to constant moisture or repeated mechanical stress.

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