Rolex · Lady-Datejust

Strap for Lady-Datejust 26 Rolesor Fluted Champagne Oyster

Takes 13 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width13 mm
Case diameter26 mm
Reference179173-0186
FamilyLady-Datejust
MovementRolex caliber 2235 hours, minutes, seconds | date | chronometer
Year2017
CaseYellow Gold, Stainless Steel

Recommended spring bar

Spring bars Datejust 26 ladies steel — 13mm

Technical match for lug width and diameter · lug 13 mm · Ø 1.8 mm · closed lugs

All Rolex spring barsOpen →

The Lady-Datejust 179173-0186, seen from the bench

The Lady-Datejust 26 Rolesor Fluted Champagne Oyster (ref. 179173-0186) features a 26mm case in yellow Rolesor—a bimetallic combination of OYSTERSTEEL stainless steel and 18-carat yellow gold. Powered by the Rolex Calibre 2235 automatic movement with unidirectional Perpetual rotor, it oscillates at 28,800 vibrations per hour with approximately 48 hours power reserve. The date window is magnified by the iconic Cyclops lens on the sapphire crystal. The lug width is 13mm.

Frequently asked questions

What is the lug width of the Rolex Lady-Datejust 179173-0186?

The Rolex Lady-Datejust 179173-0186 has a lug width of 13mm. This is a non-standard measurement specific to Rolex 26mm cases, requiring straps manufactured to precise specifications to ensure a secure fit without mechanical play.

What is the best strap for the Lady-Datejust 179173-0186 in yellow Rolesor?

For the Lady-Datejust 179173-0186 in yellow Rolesor, the most aesthetically coherent straps are in polished alligator in cognac, bordeaux, or black tones, or in vegetable-tanned calf leather that develops a genuine patina over time. Shell cordovan is a distinguished alternative for those seeking a dense, compact texture. A yellow gold PVD deployante clasp completes the look for formal occasions.

How do you change the strap on a Rolex Lady-Datejust 179173-0186?

To replace the strap on the Lady-Datejust 179173-0186, the 13mm spring bars must be removed from the lugs using a dedicated springbar tool. It is advisable to work on a soft surface to protect the yellow Rolesor case from scratches. Given the non-standard lug width and the precious materials involved, it is recommended to entrust the operation to a watchmaker or the Casati Milano atelier.

Are there aftermarket straps compatible with the Rolex Lady-Datejust 179173-0186?

Yes, aftermarket straps compatible with the Rolex Lady-Datejust 179173-0186 are available, provided they feature a 13mm curved end fitting designed to follow the contour of the Oyster case. Milano Straps produces bespoke straps specifically for this reference, available in various materials and finishes. Compatibility of the end fitting must be confirmed before purchase.

How long does a leather strap last on a Rolex Lady-Datejust 179173-0186?

The lifespan of a leather strap on a Rolex Lady-Datejust 179173-0186 depends on the quality of the leather and daily use. A high-quality alligator or vegetable-tanned calf leather strap, properly maintained with conditioning cream and rotated with other straps, can last between 3 and 7 years while retaining a well-kept appearance. Milano Straps straps are covered by an 18-month warranty against manufacturing defects.

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