Tudor · Classic

Strap for Classic 38 Stainless Steel / Yellow Gold / Fluted / White-Diamond / 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
Reference21013-0006 (aka: M21013-0006)
FamilyClassic
MovementETA caliber 2824-2 Hours, Minutes, Seconds | Date
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 21013-0006 (aka: M21013-0006)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Classic 21013-0006 (aka: M21013-0006), seen from the bench

The Tudor Classic 21013-0006 is a 38 mm dress watch in stainless steel and yellow gold with a 20 mm lug width. Powered by the ETA 2824-2 caliber, it features hours, minutes, seconds and date functions. This bicolor model exemplifies Tudor's approach to proportioned, functional timepieces that balance formal and casual wear without excess decoration.

Frequently asked questions

What is the lug width of the Tudor Classic 21013-0006?

The lug width of the Tudor Classic 21013-0006 is 20 millimetres. This parameter represents the precise distance between the case lugs and determines compatibility with any aftermarket strap or bracelet. A 20mm strap will fit perfectly into the attachment slots of the case without excessive play or insertion difficulty.

Which strap is ideal for the Tudor Classic 21013-0006?

For the 21013-0006, we recommend cognac-brown alligator for formal contexts, which complements the warm tone of the two-tone case. Black alligator conveys severity and versatility. Navy-blue leather represents an elegant tonal compromise. For those seeking daily versatility, an anthracite-grey NATO or resistant textile maintains the proportions of the 38mm case without sacrificing functionality.

How do I change the strap on a Tudor Classic 21013-0006?

Changing the strap on the 21013-0006 is straightforward. Obtain a spring bar tool or small screwdriver and position it on the opposite side of the lug, pushing towards the centre of the case to release the internal spring that secures the pin. Once the metal pin is extracted, the old strap comes off easily. Insert the new strap, aligning the holes with the pins, and repeat the operation on the opposite side.

Can I use a non-official aftermarket strap on the Tudor Classic 21013-0006?

Yes, absolutely. A 20mm aftermarket strap guarantees perfect technical compatibility with the 21013-0006. Quality artisanal straps in alligator, vegetable-tanned leather or calf often surpass official straps in finish and durability whilst maintaining full mechanical compatibility with the case and ensuring conscious aesthetic personalisation.

How long does a leather strap last on the Tudor Classic 21013-0006?

A quality leather strap (alligator or calf with vegetable tanning) typically lasts 3–5 years with regular daily use, depending on exposure to weather, humidity and perspiration. Vegetable tanning develops a natural patina over time, enhancing aesthetics without compromising strength. A well-maintained alligator or calf strap can extend durability beyond 5 years. Vulcanised rubber, as an alternative, lasts longer but does not evolve aesthetically over time.

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