The Rolex Lady-Datejust 26 Ref. 179173 in the MRO configuration is a distinctive and highly luxurious timepiece from the previous 26 mm generation, celebrated for its unique combination of natural materials and classic design. This model is constructed using the iconic two-tone aesthetic, known as Yellow Rolesor (the harmonious fusion of Oystersteel and 18K Yellow Gold). The watch gains immediate recognition and a brilliant, sparkling effect from its iconic 18K Yellow Gold Fluted Bezel, a signature Rolex element renowned for its geometric texture and exceptional light reflection.
The absolute centerpiece of this timepiece is the exquisite Mother-of-Pearl (MOP) Dial . Sliced from the inner shell of an oyster, MOP is treasured for its natural iridescence, shimmering through a unique spectrum of colors that constantly shift with the light, guaranteeing that no two dials are identical. The markers chosen for this unique surface are traditionally styled, applied Roman Numerals (typically set in 18K Yellow Gold), which impart a classic, timeless, and readable character, providing a powerful contrast against the ethereal MOP background.
Key Features
| Case | Material | Yellow Rolesor (Oystersteel and 18K Yellow Gold) |
| Dimensions | 26 mm (Previous generation size) | |
| Water Resistance | ( ) | |
| Bezel | Fluted 18K Yellow Gold (Rolex’s signature design) | |
| Crystal | – | |
| Reference | 179173MRO | |
| Dial | Color | Mother-of-Pearl (MOP) (Iridescent, unique natural shell surface) |
| Markers | Applied Roman Numerals (in 18K Yellow Gold) | |
| Aesthetic | Highly luxurious, naturally unique, shimmering MOP dial with Roman numerals | |
| Movement | Type | Perpetual, mechanical, self-winding |
| Power Reserve | Approximately 50 |
|
| Caliber | Calibre 2235 (Previous generation movement) | |
| Technology | Parachrom hairspring, Superlative Chronometer | |
| Bracelet/Strap | Material | Oyster Yellow Rolesor (three-piece links) |
| Clasp | Folding Oysterclasp with Easylink extension link | |
| Additional Info | Watch Style | High-Luxury Two-Tone Dress Watch / Exotic Dial |
| Certification | ||
| Key Features | Fluted Bezel, Mother-of-Pearl Roman Numerals Dial, Oyster Bracelet, Yellow Rolesor | |
| Rolesor | () () |










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