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 width
Straps for the Royal 28400-0009 (aka: M28400-0009)
Selected for the 20 mm lug width · workshop selection
Hammered Calfskin Strap Light Blue€98
Hammered Calfskin Strap Light Blue€98
Hammered Calfskin Watch Strap Green with Ecru Stitching€98
Red Suede Strap with Stitching — Milano Straps€90
Dark Brown Calfskin Military Strap€80
The Royal 28400-0009 (aka: M28400-0009), seen from the bench
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.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only
