Tudor · Classic

Strap for Classic 38 Stainless Steel / Yellow Gold / Fluted / Silver-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
Reference21013-0012 (aka: M21013-0012)
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 21013-0012 (aka: M21013-0012)

Selected for the 20 mm lug width · workshop selection

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The Classic 21013-0012 (aka: M21013-0012), seen from the bench

The Tudor Classic M21013-0012 is a two-tone timepiece combining yellow gold and stainless steel in a 38mm case. It is powered by the ETA 2824-2 automatic movement, offering approximately 38 hours of power reserve and 28,800 vibrations per hour. The watch features hours, minutes, seconds, and a date window at 3 o'clock. Water resistance reaches 50 meters. The lug width measures 20mm, a standard dimension in classic watchmaking that allows compatibility with quality aftermarket straps.

Frequently asked questions

What is the lug width of the Tudor Classic 21013-0012?

The Tudor Classic 21013-0012 features a lug width of 20 millimetres. This is the distance between the two lugs that support the strap beneath the case. A 20mm lug width is a widely adopted standard in classical watchmaking and allows for a broad selection of compatible aftermarket straps.

What strap is best suited for the Tudor Classic 21013-0012?

Given the two-tone character of the case in yellow gold and stainless steel, vegetable-tanned leather straps represent the most aesthetically coherent choice. Cognac brown and dark brown straps emphasise the nobility of the case without competing chromatically. Alligator remains the most conservative solution for formal occasions, whilst shell cordovan offers pronounced texture and natural rigidity.

How do I change the strap on the Tudor Classic 21013-0012?

Strap replacement is straightforward: remove the lateral spring bar pins connecting the strap to the case lugs using a spring bar tool. Extract the old strap, then align the new strap and insert the pins into the lugs, pushing until they click into position. Ensure the pins are fully seated to prevent lateral movement.

Can I fit an aftermarket strap to the Tudor Classic 21013-0012?

Yes, any strap with a 20mm lug width is compatible with the Tudor Classic 21013-0012. Artisanal straps often offer superior construction quality to OEM solutions, with personal choice of leathers, finishes and closure systems. Milanostraps offers a curated selection of 20mm straps ready for dispatch and customisable to measure.

How long does a leather strap last on the Tudor Classic 21013-0012?

The lifespan of a leather strap depends on usage, tanning type and construction quality. An artisanal strap in vegetable-tanned calf or quality alligator can last between three and five years under regular use, developing characteristic patina over time. Lower-quality straps tend to deteriorate more rapidly. Periodic maintenance and strap rotation extend longevity.

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