Tudor · Classic

Strap for Classic 38 Stainless Steel / Yellow Gold / Diamond / 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
Reference21023-0006 (aka: M21023-0006)
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 21023-0006 (aka: M21023-0006)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Classic 21023-0006 (aka: M21023-0006), seen from the bench

The Tudor Classic reference 21023-0006 features hour, minute, second and date functions. It is equipped with the automatic ETA 2824-2 caliber with automatic winding system. The movement offers hour indication on three hands and a date window.

Frequently asked questions

What is the lug width of the Tudor Classic 21023-0006?

The Tudor Classic 21023-0006 is fitted with 20mm lugs. This intermediate width reflects the dress-watch positioning of the model and is compatible with the broad range of artisanal 20mm straps available. Lug width is measured as the distance between the centre of one lug and the centre of the opposite lug using callipers, excluding the watch case body itself.

Which strap is most suitable for the Tudor Classic 21023-0006?

For the 21023-0006, alligator leather with vegetable tanning in dark brown or cognac tones represents the most coherent choice with the bicolour steel-yellow gold case. Shell cordovan is the premium alternative for those seeking superior durability. For daily business casual wear, vegetable-tanned calf in black or brown maintains formal legitimacy with greater maintenance practicality than exotic leathers.

How do I change the strap on the Tudor Classic 21023-0006?

Strap changing is performed by removing the spring bars that anchor the strap to the lugs. Using a dedicated spring bar tool, gently depress the internal spring of the pin to release the shoulders of the old strap, then insert the new strap into the lug openings by repeating the operation symmetrically. Care must be taken not to scratch the gold-plated lugs during this procedure.

Can aftermarket straps be fitted to this Tudor?

Yes, it is entirely possible to fit artisanal custom-made aftermarket straps to the Tudor 21023-0006, provided they are constructed to the 20mm lug specification and fitted with compatible bars (universal standard). Many Italian artisans, such as Casati Milano, create personalised straps specifically for this case, paying careful attention to dress-watch proportions and the chromatic requirements of the steel-gold composition.

How long does a leather strap last on the Tudor Classic 21023-0006?

A natural leather strap (alligator, cordovan, calf) subject to moderate daily use typically lasts 3-5 years before requiring replacement due to natural leather wear at the buckle hole. With preventative maintenance (protection from excessive moisture, seasonal conditioning), the lifespan extends beyond 5 years. Alligator and cordovan age beautifully, developing appealing patina. The standard warranty for quality artisanal straps is 18 months.

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