Tudor · Black Bay One

Strap for Black Bay 36 S&G - Diamond / Silver - Diamond / Bracelet

Takes 19 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width19 mm
Case diameter36 mm
Reference79653-0006 (aka: M79653-0006)
FamilyBlack Bay One
MovementTudor caliber MT5400 Hours, Minutes, Seconds | Chronometer
CaseYellow Gold, Stainless Steel

Spring bar

Spring bars for Tudor

The right category for this model · choose the 19 mm size

The Black Bay One 79653-0006 (aka: M79653-0006), seen from the bench

The Black Bay One represents a unique piece made by Tudor for charitable purposes. It mounts the automatic MT5400 caliber with chronometer certification and hour, minute and second functions. The watch features 19mm lugs and a construction dedicated to this special version.

Frequently asked questions

What is the lug width of the Tudor Black Bay One 79653-0006?

The Tudor Black Bay One 79653-0006 features 19mm lugs. This measurement represents the distance between the two holes where the spring bars are secured to the case. It is essential to verify this specification before purchasing an aftermarket strap, as even a 1mm discrepancy will result in fitting issues.

What is the best strap for the Tudor Black Bay One 79653-0006?

Given the two-tone case in yellow gold and stainless steel, we recommend alligator in dark tones (black, burnt brown) to enhance formal sophistication, or vegetable-tanned calf leather in warm shades (cognac, tobacco) for daily wear with natural patina development over time. Shell cordovan suits those seeking material density, whilst structured rubber represents the sport-oriented option.

How do I change the strap on my Tudor Black Bay One 79653-0006?

Obtain a spring bar removal tool or consult a watchmaker. Position the tool in the groove of the spring bar, apply pressure towards the case centre and gently withdraw the old strap. Insert the new strap by aligning the holes with the spring bars and press until you hear the securing click. Verify the strap is not twisted before wearing the watch.

Is an aftermarket 19mm strap compatible with the 79653-0006?

Yes, provided the strap is specifically dimensioned for 19mm lugs and the interior hole diameter of the passants is correctly sized for Tudor spring bars. Always verify the manufacturer's specifications, as even minor variations in hole diameter cause play or installation difficulty.

How long does a leather strap last on the Tudor Black Bay One 79653-0006?

A quality artisanal leather strap (alligator, calf, shell cordovan) with vegetable or mineral tanning typically lasts 4–8 years with daily wear, depending on maintenance and climate conditions. Humidity and sun exposure accelerate ageing. Keeping the strap dry, avoiding aggressive conditioners and periodically applying a natural water-repellent treatment extends its lifespan.

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