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
Reference21013-0001 (aka: M21013-0001)
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 21013-0001 (aka: M21013-0001)

Selected for the 20 mm lug width · workshop selection

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The Classic 21013-0001 (aka: M21013-0001), seen from the bench

The Tudor Classic 21013-0001 is a 38mm stainless steel watch with a yellow gold fluted bezel, featuring the ETA 2824-2 automatic movement with 25 jewels, date function, and approximately 38 hours power reserve. The lug width is 20mm. This bicolor steel-and-gold model represents Tudor's heritage of robust, reliable timepieces with contemporary refinement, combining everyday sobriety with prestige design without excessive ornamentation.

Frequently asked questions

What is the lug width of the Tudor Classic 21013-0001?

The lug width (or ansa measurement) of the Tudor Classic 21013-0001 is 20 millimetres. This dimension represents the distance between the case lugs and is the standard specification for 38-millimetre diameter watches. You can verify it by measuring the gap between the two metal attachment pins with a digital calliper.

Which strap pairs best with the Tudor Classic 21013-0001?

For the Tudor Classic 21013-0001, we recommend a vegetable-tanned calfskin strap, which develops a natural patina over time creating an elegant dialogue with the yellow gold bezel. Alternatively, an alligator strap offers a smooth, lustrous surface ideal for formal occasions, or shell cordovan for those seeking extreme durability and depth of character.

How do I change the strap on the Tudor Classic 21013-0001?

Strap replacement involves removing the pins or bars connecting the strap to the case lugs. A dedicated spring bar remover tool is required to prevent scratching. 20-millimetre straps are installed by inserting the pin into the lugs from beneath and securing it in position. Professional assistance is recommended if undertaking this for the first time.

Can I use an aftermarket 20mm strap on this watch?

Yes, aftermarket straps in 20 millimetres are fully compatible with the Tudor Classic 21013-0001. On milanostraps.it you will find a selection of artisanal-quality straps, customisable in measurements, initials and stitching thread, ensuring perfect compatibility without compromising construction quality.

How long does a leather strap last on the Tudor Classic 21013-0001?

The lifespan of a leather strap depends on frequency of use and tanning type. A high-quality vegetable-tanned calfskin typically lasts 3–5 years with daily wear, developing a beautiful patina throughout. Shell cordovan can last over 7 years due to the density of the material. Proper maintenance, including avoiding water immersion, significantly extends useful life.

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