Rolex Datejust 31 Ref. 278240-0015 – Dark Grey Dial with Roman Numerals in Oystersteel
The Rolex Datejust 31 Ref. 278240-0015 stands as a testament to Rolex’s enduring craftsmanship and timeless elegance. With its dark grey dial featuring classic Roman numerals, a refined domed bezel, and robust Oystersteel construction, this watch embodies the brand’s perfect balance of luxury, durability, and understated sophistication. Designed for those who appreciate purity of design and mechanical excellence, this model captures the true spirit of the Datejust collection.
Elegant and Enduring Design
The 31 mm Oyster case of the Rolex Datejust 31 is crafted entirely from Oystersteel—a highly resistant stainless steel alloy used exclusively by Rolex. Known for its superior corrosion resistance and polished luster, Oystersteel ensures that the timepiece maintains its beauty even after years of wear. The domed bezel adds a smooth, graceful contour to the case, enhancing its minimalist aesthetic while preserving the Datejust’s instantly recognizable silhouette.
Dark Grey Dial with Roman Numerals
At the heart of this model lies a beautifully balanced dark grey dial that radiates quiet strength and sophistication. The deep tone of the dial contrasts elegantly with the polished Roman numeral hour markers, giving it a refined and timeless look. Each numeral is crafted with meticulous precision, reflecting Rolex’s dedication to detail. The signature Rolex crown at 12 o’clock and the date display at 3 o’clock, magnified by the iconic Cyclops lens, complete the dial’s harmonious symmetry.
Oyster Bracelet: Comfort and Strength
The watch is fitted with the legendary Oyster bracelet, known for its robustness and enduring style. Composed of three-piece solid links, the bracelet offers exceptional comfort and strength, ideal for everyday wear. Its Oysterclasp with the Easylink comfort extension system allows the wearer to adjust the bracelet length by approximately 5 mm for a perfect fit. Polished and satin-brushed surfaces create a subtle interplay of light, underscoring Rolex’s attention to refined finishes.
Precision Movement: Caliber 2236
Powering the Datejust 31 Ref. 278240-0015 is the self-winding Rolex Caliber 2236, a movement entirely developed and manufactured in-house. Equipped with a Syloxi silicon hairspring, it provides exceptional resistance to magnetic fields, temperature variations, and shocks—ensuring unparalleled accuracy and reliability. As a Superlative Chronometer, the movement guarantees a precision of −2/+2 seconds per day and offers a power reserve of approximately 55 hours.
Subtle Luxury, Everyday Versatility
Refined yet versatile, the Rolex Datejust 31 Ref. 278240-0015 is designed to transition effortlessly from day to evening. The combination of the dark grey dial and polished Oystersteel case creates an aura of strength and modernity, making it suitable for any occasion—professional or casual. The domed bezel and Roman numerals lend a classic touch that appeals to those who appreciate traditional watchmaking artistry reinterpreted for contemporary life.
Key Features
- Reference: 278240-0015
- Case: 31 mm Oystersteel
- Bezel: Domed, polished
- Dial: Dark grey with Roman numerals
- Bracelet: Oyster, three-piece solid links in Oystersteel
- Movement: Automatic Caliber 2236 with Syloxi hairspring
- Power Reserve: Approximately 55 hours
- Water Resistance: 100 meters / 330 feet
- Crystal: Scratch-resistant sapphire with Cyclops lens
The Rolex Datejust 31 Ref. 278240-0015 epitomizes classic Rolex design—a perfect fusion of durability, elegance, and precision. Its dark grey Roman dial and sleek Oystersteel construction make it a timeless companion for those who value sophistication that endures.

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