Description
The Rolex Datejust 31 ref. 178240 (2016 warranty) is a beloved mid-size classic that stands out among used Rolex watches for its elegant proportions, striking blue sunburst dial, and timeless appeal. The 31mm Oystersteel case features a smooth polished bezel and brushed sides for balanced refinement, making it ideal for smaller wrists or unisex wear. The blue sunburst dial shimmers beautifully in light with applied Roman numeral markers and gold hands for sophisticated legibility, while the magnified date at 3 o’clock via Cyclops lens adds practical functionality.
Powered by the reliable Calibre 2235 (COSC-certified chronometer, quickset date), it offers consistent accuracy and everyday dependability. The Oyster bracelet with three-piece solid links, Oysterclasp, and Easylink 5mm extension ensures secure comfort for all-day wear.
This like-new example (great overall condition, minimal/no visible wear) comes as a complete original set: original box, booklet, hangtags, 2016 warranty card, and all accessories—ensuring authenticity and strong investment-grade appeal at $8,750 USD (competitive with secondary market $7,500–$9,500 for similar mint mid-size Datejusts with full set).
Among used Rolex watches, the Datejust 31 ref. 178240 offers vintage-inspired sizing (classic 31mm from earlier generations) with modern updates—contrasting larger sports models like Submariner or GMT-Master II. The blue sunburst Roman dial is highly collectible for its rich color and elegant markers; smooth bezel keeps it understated yet luxurious. Compared to Oyster Perpetual (no date, simpler), it adds date functionality and dressier appeal; versus two-tone or diamond variants, all-steel provides versatility and value.
Occasions suit this Datejust for daily wear (office, casual, jeans/blazer), formal events (pairs beautifully with dresses/suits), or as a timeless gift—the blue dial adds personality without overwhelming. Less ideal for extreme sports (opt for Submariner) but excels in refined, everyday luxury.
Deep insights: The Datejust 31 (ongoing since 1945) remains one of Rolex’s most versatile sizes; blue sunburst Roman dials surged in popularity post-2010s. 2016 examples with full set hold strong resale due to condition and original accessories—excellent entry into used Rolex watches with low depreciation risk.
Secure this stunning used Rolex Datejust with insured shipping. Contact us for extra photos or authentication details to own this timeless piece!
- Brand: Rolex
- Model: Datejust 31
- Reference: 178240
- Category: Luxury Dress Watch / Mid-Size Datejust (unisex, popular for women and smaller wrists)
- Case Size: 31mm (diameter) x ~11mm (thickness), lug-to-lug ~38mm
- Material: Oystersteel (904L stainless steel case, smooth bezel, Oyster bracelet)
- Dial: Blue sunburst with applied Roman numeral markers, gold hands, date at 3 o’clock with Cyclops lens
- Bezel: Smooth stainless steel (polished finish)
- Movement: Rolex Calibre 2235 (automatic, self-winding; COSC-certified chronometer)
- Power Reserve: Approximately 48 hours
- Water Resistance: 100 meters / 330 feet
- Crystal: Scratch-resistant sapphire with Cyclops lens
- Bracelet: Stainless steel Oyster three-piece solid links with Oysterclasp and Easylink 5mm extension
- Condition: Like New (excellent overall, minimal/no wear, well-maintained)
- Features: Date function (quickset), Super-LumiNova on hands/markers (limited glow), screw-down crown
- Price: $8,750 USD (placeholder—adjust to your actual asking price)
- Year: 2016 (warranty card dated 2016; production likely 2015–2016)
- Authenticity & Included: 100% genuine Rolex; Original Box, Booklet, Hangtags, Warranty Card (dated 2016), Complete Full Set
- Other Details: Blue sunburst dial with Roman numerals (highly collectible colorway); smooth bezel for classic elegance; versatile mid-size for smaller wrists or unisex wear
Characteristics
The Rolex Datejust 31 ref. 178240 (2016 warranty) is a timeless mid-size classic, featuring the iconic blue sunburst dial with applied Roman numerals for elegant, high-contrast legibility. The 31mm Oystersteel case offers perfect proportions for smaller wrists or unisex styling, with brushed/polished finishes and a smooth bezel for understated sophistication.
Powered by Calibre 2235 (COSC-certified, quickset date), it delivers reliable precision. The Oyster bracelet provides durable comfort and security with Easylink extension. As a used Rolex watches favorite, this like-new example combines vintage charm (31mm size) with modern refinement—ideal for everyday luxury or special occasions.






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