Tudor · Style

Strap for Style 34 Stainless Steel / Yellow Gold / Silver-Diamond / Strap

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

Lug width20 mm
Case diameter34 mm
Reference12303-0011 (aka: M12303-0011)
FamilyStyle
MovementTudor caliber T601 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 Style 12303-0011 (aka: M12303-0011)

Selected for the 20 mm lug width · workshop selection

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The Style 12303-0011 (aka: M12303-0011), seen from the bench

The Tudor Style 12303-0011 features a 34mm bi-material case combining 316L stainless steel and 18K yellow gold with a ceramic bezel and anti-reflective sapphire crystal. It houses the proprietary T601 automatic movement with manual winding, COSC-certified for -4/+6 seconds per day accuracy. The 20mm lug width is critical for aftermarket strap compatibility; structured calf or alligator leather straps are recommended over thick NATO options.

Frequently asked questions

What is the lug width of the Tudor Style 12303-0011?

The lug width of the Tudor Style 12303-0011 is 20mm. This measurement represents the internal distance between the two lugs of the case where the strap is fitted. Precise verification is essential, as an undersized strap would move within the slot, whilst an oversized strap would not fit into the lug seat.

Which strap is best suited for the Tudor Style 12303-0011?

For this two-tone case (steel and yellow gold), straps in alligator leather or vegetable-tanned calf are most recommended. Alligator leather enhances the natural grain without adding visual contrast, whilst structured calf ensures an elegant transition between the two metals. Ideal colours: cognac brown, black, or natural beige.

How do you change the strap on a Tudor Style 12303-0011?

Remove the strap from the lugs using a spring bar tool or thin flat probe. Gently push towards the centre of the case to release the elastic pin, then extract the old strap. Position the new strap by aligning the holes with the lugs and reinsert the elastic pin, ensuring it is locked symmetrically on both sides.

Can I use an aftermarket compatible strap with the Tudor Style 12303-0011?

Yes, 20mm aftermarket straps are fully compatible with this model. It is crucial to select certified brands that guarantee precise tolerances. Milanostraps offers customisable straps compatible with this reference, featuring rapid shipping and the option to personalise dimensions, initials, and stitching thread colour.

How long does a leather strap last on the Tudor Style 12303-0011?

A quality natural leather strap (alligator, shell cordovan, or calf) has an average lifespan of 2-4 years with daily wear, varying depending on exposure to moisture and direct sunlight. The deployant clasp should be inspected every 18 months to verify the integrity of the locking mechanism. Rotating multiple straps extends the overall lifespan of your collection.

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