Tudor · Royal

Strap for Royal Date 34 Stainless Steel / Blue - Diamond

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
Reference28400-0007 (aka: M28400-0007)
FamilyRoyal
MovementTudor caliber T601 Hours, Minutes, Seconds | Date
CaseStainless Steel

Spring bar

Spring bars for Tudor

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

Straps for the Royal 28400-0007 (aka: M28400-0007)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Royal 28400-0007 (aka: M28400-0007), seen from the bench

The Tudor Royal reference 28400-0007 is powered by the T601 caliber with hour, minute, second and date functions. The movement offers the essential daily-use features in a classic three-hand configuration. The case displays the distinctive design of the brand's Royal line.

Frequently asked questions

What is the lug width of the Tudor Royal 28400-0007?

The Tudor Royal 28400-0007 features a 20mm lug width. This measurement, also known as strap width or strap size, determines cinturino compatibility. It is measured from the inner wall of one lug to the inner wall of the opposite lug, perpendicular to the case body. You can verify this by consulting the warranty booklet or observing the code engraved inside the case.

What is the best strap for the Tudor Royal 28400-0007?

The choice depends on intended use. For formal occasions, genuine alligator with natural patina creates visual continuity with the case's linear architecture. For everyday versatility, vegetable-tanned calf leather offers tactile softness and warm colour palettes (tan, cognac) that age beautifully. For casual sporting occasions, ballistic nylon NATO or FKM rubber straps maintain the piece's elegant sportiness. Shell cordovan, whilst unconventional for a 34mm watch, delivers exceptional chromatic depth for those seeking it.

How do I change the strap on my Tudor Royal 28400-0007?

The Tudor Royal 28400-0007 uses standard spring bars for strap replacement. You will need a dedicated spring bar tool. Position the old strap horizontally, insert the tool into the designated spaces adjacent to the pin, press downward to release the spring, and extract the pin end. Repeat for both sides. Insert the new strap by aligning the holes, then press until you hear the safety click. If you prefer to avoid risk, many ateliers, including Casati Milano, offer professional strap changes by appointment.

Can I use an aftermarket compatible strap on my Tudor Royal?

Absolutely yes. The Tudor Royal 28400-0007 is compatible with any 20mm strap available on the market. Artisanal straps offered by milanostraps.it are specifically tested for this lug width and presented in quality materials (alligator, calf, NATO, rubber) with customisation options (length, initials, thread colour). A quality aftermarket strap can transform the aesthetics of your Tudor whilst preserving its elegant sporting soul.

How long does a natural leather strap last on a watch like the Tudor Royal?

A quality natural leather strap has an average lifespan of 3–5 years with regular daily use, provided proper maintenance. Vegetable-tanned calf straps develop a fascinating patina in the first year, then maintain structure for 4–6 years before requiring replacement. Alligator, thanks to its natural density, may last 5–7 years. FKM rubber straps have similar longevity (3–5 years). Factors influencing durability: ambient humidity, cleaning frequency, direct sun exposure. Artisanal straps from milanostraps.it, owing to handicraft quality and selected materials, tend to age more elegantly than industrial straps.

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