Rolex · Lady-Datejust

Strap for Lady-Datejust 28 Rolesor Yellow Fluted / Jubilee / Champagne Diamond

Takes 14 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width14 mm
Case diameter28 mm
Reference279173-0021
FamilyLady-Datejust
MovementRolex caliber 2236 hours, minutes, seconds | date | chronometer
Year2016
CaseYellow Gold, Stainless Steel

Recommended spring bar

Spring bars Rolex Lady-Datejust 14mm — 1.5mm diameter

Technical match for lug width and diameter · lug 14 mm · Ø 1.5 mm

All Rolex spring barsOpen →

The Lady-Datejust 279173-0021, seen from the bench

The Rolex Lady-Datejust 28 Rolesor Yellow Fluted model (ref. 279173-0021) belongs to one of watchmaking's most enduring lines, introduced in 1945 as the first wristwatch with automatic date mechanism. This specific reference embodies Rolex's patented Rolesor combination of Oystersteel and 18-carat yellow gold. The 28mm case diameter, fitted with a 14mm lug width, represents proportional design calibrated for the feminine wrist without excess. At its core beats the Rolex 2236 manufacture calibre, a COSC-certified chronometer movement with precision between -2 and +2 seconds per day and approximately 55 hours power reserve, equipped with a Syloxi silicon balance wheel.

Frequently asked questions

What is the lug width of the Rolex Lady-Datejust 279173-0021?

The Rolex Lady-Datejust 279173-0021 features a lug width of 14mm. This measurement refers to the internal distance between the two lugs at the point where the spring bar sits. It is essential to verify this measurement with a digital calliper before purchasing any aftermarket strap.

What is the best strap for the Rolex Lady-Datejust 279173-0021?

For the Lady-Datejust 279173-0021 in Rolesor (Oystersteel and 18-carat yellow gold), straps in alligator leather with natural grain in burgundy, midnight blue or cognac tones are the most coherent choice given the watch's formal character. Vegetable-tanned calf leather or shell cordovan are valid alternatives for those who prefer a more uniform texture. The recommended closure is a yellow gold pin buckle or a butterfly deployant clasp, both in 14mm.

How do you change the strap on a Rolex Lady-Datejust 279173-0021?

To replace the strap on the Lady-Datejust 279173-0021, you need to remove the spring bars that secure the original bracelet or strap to the case lugs. Use a dedicated bifurcated spring bar tool, applying gentle leverage to avoid scratching the Oystersteel lugs. It is advisable to work on a soft surface and, if in doubt, to entrust the operation to a watchmaker or a specialist atelier such as Casati Milano.

Are there aftermarket straps compatible with the Rolex Lady-Datejust 279173-0021?

Yes, any strap with a 14mm lug width and end-piece curvature compatible with the Rolex lug profile can be fitted to the Lady-Datejust 279173-0021. Milano Straps offers a selection of handcrafted 14mm straps in various materials (alligator, calf leather, shell cordovan, rubber), available either bespoke or ready to order online, with customisable stitching and buckle finishes.

How long does a leather strap last on a Rolex Lady-Datejust 279173-0021?

The lifespan of a leather strap depends on the material, care, and frequency of use. A high-quality alligator strap, if rotated with other straps and kept away from moisture and chemicals (perfumes, creams), can last between 3 and 7 years while maintaining an impeccable appearance. Vegetable-tanned straps develop a natural patina over time that enhances their aesthetic appeal. Milano Straps provides an 18-month guarantee against manufacturing defects on all its straps.

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