Tudor · Classic

Strap for Classic 38 Stainless Steel / Yellow Gold / Fluted / Silver / Bracelet

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

Lug width20 mm
Case diameter38 mm
Reference21013-0011 (aka: M21013-0011)
FamilyClassic
MovementETA caliber 2824-2 hours, minutes, seconds | date
Year2006
CaseYellow Gold, Stainless Steel

Spring bar

Spring bars for Tudor

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

Straps for the Classic 21013-0011 (aka: M21013-0011)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Classic 21013-0011 (aka: M21013-0011), seen from the bench

The Tudor Classic reference 21013-0011 is equipped with the automatic ETA 2824-2 caliber with hour, minute, second and date indication. The movement offers a power reserve of around 38 hours and a frequency of 28,800 vibrations per hour. The watch is part of the brand's dress watch collection.

Frequently asked questions

What is the exact lug width of the Tudor Classic 21013-0011?

The lug width of the Tudor Classic Ref. 21013-0011 is 20 millimetres. This dimension is critical when selecting an aftermarket strap: it represents the distance between the two holes through which the spring bars pass. An incorrect measurement will result in complete incompatibility. We recommend verifying this specification before ordering.

Which strap is best suited to the two-tone Tudor Classic 21013-0011?

For the stainless steel and yellow gold two-tone case, we recommend cognac alligatore to maximise formal aesthetics, or cognac vitello with fine grain for daily versatility. Alternatively, absolute black vitello with gold fittings creates sartorial contrast. Shell cordovan, if available in 20mm, represents the premium choice for longevity and developing patina over time.

How do I change the strap on the Tudor Classic 21013-0011?

Strap replacement is performed by removing the spring bars using a specialised tool (spring bar tool). Position the watch with the case facing upwards, locate the holes on the axes that pass through the case and bars, then gently extract the bars using the tool. Remove the old strap and insert the new one by aligning the holes with the bars, then reinsert the bars until they click. Professional servicing is not necessary if you have reasonable dexterity.

Is an aftermarket 20mm strap truly compatible with the 21013-0011?

Yes, provided the strap is specifically manufactured for 20mm lug width. Our straps on milanostraps.it are certified for this width and have been tested on numerous Tudor models with identical lug width. Always verify that the strap features a quick-release bar or a secure fixing system to ensure both safety and visual balance with the case.

How long does a leather strap last on a daily-wear watch?

A quality leather strap (alligator, vitello, shell cordovan) worn daily typically lasts 5–7 years before requiring replacement. Longevity depends on ambient humidity, frequency of wear, and maintenance: periodic cleaning with a dry cloth and the application of leather conditioner designed for watchstraps extends useful life. Rubber FKM or NATO straps have superior longevity (8–10 years) due to the absence of biological degradation.

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