Tudor · Black Bay

Strap for Heritage Black Bay Black Dark / Strap

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
Reference79230DK-0007 (aka: M79230DK-0007, 79230DK0007)
FamilyBlack Bay
MovementTudor caliber MT5602 Hours, Minutes, Seconds | Chronometer
CaseStainless 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 79230DK-0007 (aka: M79230DK-0007, 79230DK0007)

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Black Bay 79230DK-0007 (aka: M79230DK-0007, 79230DK0007), seen from the bench

The Black Bay represents the Tudor dive watch line, equipped with the COSC-certified automatic MT5602 caliber. The watch offers hour, minute and second functions with 22mm lugs. The movement guarantees chronometric performance to COSC standards.

Frequently asked questions

What is the lug width of the Tudor Black Bay 79230DK-0007?

The Tudor Black Bay 79230DK-0007 features a lug width of 22mm. This measurement is determined by the geometry of the 41mm case and the positioning of the lateral lugs. To verify it with precision, use a digital calliper inserted between the two strap attachment pins midway between 12 and 6 o'clock.

Which strap pairs best with the Black Bay 79230DK-0007?

The choice depends on intended use. Vegetable-tanned alligator in black delivers formal elegance whilst maintaining coherence with the model's military heritage. A premium textile NATO strap reinterprets tactical lineage without compromise. A certified FKM rubber is the tactical choice for aquatic environments. Regenerated calf offers immediate suppleness and sustainability, ideal for daily wear.

How do you change the strap on a Tudor Black Bay 79230DK-0007?

Two essential tools are required: a springbar remover (a tapered tool) and a soft brass hammer for case protection. Position the watch on a soft surface with the case facing upward. Locate the lateral attachment pins (visible at the case sides). Insert the springbar remover from below and pull gently upward to extract the pin. Repeat on the opposite side, then slide the old strap away. Insert the new strap into both lateral pins and push downward until they click into position.

Is an aftermarket strap for the Black Bay 79230DK-0007 compatible with other Tudor references?

A 22mm strap is compatible with any watch fitted with a 22mm lug width, including many Rolex Submariner, Sea-Dweller and tool watches from other manufacturers. However, aesthetic proportion varies according to case diameter: a 22mm on a 36mm case creates a different visual impact than on the 79230DK-0007's 41mm case. Always verify case dimensions before purchasing.

How long does a leather strap last on a Tudor Black Bay 79230DK-0007?

Durability depends on material and usage patterns. Quality vegetable-tanned alligator, with regular maintenance (damp cloth cleaning, cream treatment every 6-8 months), withstands 4-6 years of daily wear. Premium regenerated calf typically lasts 2-3 years under the same conditions. FKM rubber, if unexposed to aggressive solvents, maintains structural integrity for 3-4 years. Premium textile NATO can exceed 8 years if protected from external mechanical 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