Tudor · Royal

Strap for Royal Date 34 Stainless Steel / Salmon - Roman

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter34 mm
Reference28400-0009 (aka: M28400-0009)
FamilyRoyal
MovementTudor caliber T601 hours, minutes, seconds | date
Year2023
CaseStainless Steel

Spring bar

Spring bars for Tudor

The right category for this model · choose the 20 mm size

Straps for the Royal 28400-0009 (aka: M28400-0009)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Royal 28400-0009 (aka: M28400-0009), seen from the bench

The Tudor Royal 28400-0009 (also known as M28400-0009) is a 34mm dress watch powered by the Tudor caliber T601 automatic movement. The stainless steel case features a five-faceted design with integrated fluted bezel and salmon dial, maintaining technical rigor typical of sports watches while delivering refined aesthetics for professional settings. The 20mm lug width is precisely engineered for strap compatibility.

Frequently asked questions

What is the lug width of the Tudor Royal 28400-0009?

The lug width of the Tudor Royal 28400-0009 is 20mm. This measurement represents the horizontal distance between the lugs (the pins on the case where the strap attaches). Precise dimensional tolerances are essential when selecting a strap to avoid lateral play or excessive tension on the case structure.

Which strap is best suited for the Tudor Royal 28400-0009?

For the 28400-0009, black alligator or vegetable-tanned calf leather represent the most appropriate choices, as they coherently reflect the model's formal identity. Alligator delivers a lustrous, uniform finish; vegetable-tanned calf develops a rich patina that amplifies aesthetic value over time. For versatile use, a grey or navy blue NATO fabric strap allows greater adaptability without compromising elegance.

How do I change the strap on a Tudor watch?

Changing a strap requires a spring bar tool, a small lever-operated extractor available from specialist retailers. Position the tool under one of the case lugs to compress the spring bar and release the strap; repeat on the other side. Insert the new strap by sliding the bars through the strap slots and verify that the attachment is secure. Consult a professional if this is your first time to avoid damaging the case.

Can I use an aftermarket strap on a Tudor Royal 28400-0009?

Yes, provided the strap is manufactured with a 20mm lug width and correct dimensional tolerances. Quality artisanal straps guarantee properly calibrated slots and finishes consistent with Tudor standards. Always verify that the strap is produced by experienced manufacturers who control dimensional quality to prevent premature case wear from abnormal play or pressure.

How long does a leather strap last on a Tudor watch?

A quality leather strap, with regular maintenance, typically lasts 3-5 years of daily wear, extendable to 7-10 years with alternate use. Longevity depends on the tanning method (vegetable tanning is more durable), exposure to moisture and heat, and storage care. Shell cordovan has superior durability due to its intrinsic density. A well-maintained alligator or calf strap retains elasticity and integrity beyond this period when stored in dry environments.

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