Among mid-size Rolex references for women, the 178240 occupies a sweet spot: large enough to read easily, compact enough to feel refined on slimmer wrists. The blue sunburst dial brings a confident colour to the Lady-Datejust lineup, pairing the signature Datejust date function with a 31mm Oystersteel case that sits comfortably under a shirt cuff or alongside a bracelet stack.
Key Specifications
| Specification | Detail |
|---|---|
| Reference | 178240 |
| Case Size | 31mm |
| Case Material | Oystersteel |
| Bezel | Smooth, polished steel |
| Dial | Blue sunburst |
| Crystal | Sapphire with Cyclops lens |
| Movement | Automatic with date |
| Water Resistance | 30m |
| Bracelet | Oyster, three-piece links |
| Clasp | Folding Oysterclasp with Easylink |
| Functions | Hours, minutes, seconds, date |
The 178240 Up Close: Case, Dial and Bracelet
The blue dial radiates outward from the centre with fine sunburst brushing, shifting from deep navy in low light to a bright royal blue under direct illumination. Applied stick markers in Oystersteel carry luminescent fill for nighttime legibility. A date window at three o’clock is magnified by the Cyclops lens for quick reference.
The smooth polished bezel gives the 178240 a clean, contemporary profile compared to fluted alternatives. The Oyster bracelet with three-piece links provides a sporty, secure fit with Easylink micro-adjustment for on-the-fly comfort. Explore additional Lady-Datejust dial colours in the Lady-Datejust collection.
Movement Options: Swiss vs Japanese
Two automatic movement tiers are available to match your expectations:
- Swiss automatic — higher beat rate for a smoother seconds sweep, extended power reserve, and finishing that closely follows the genuine caliber 2236 architecture. Ideal for collectors seeking mechanical refinement.
- Japanese automatic — reliable Miyota-based movement with proven durability and accessible servicing worldwide. An excellent everyday companion with consistent accuracy.
Both options include quickset date adjustment and hacking seconds for precise time setting.
Shipping, Warranty and Returns
Every order ships with discreet packaging and full tracking. Delivery times vary by destination — see our shipping policy for detailed timeframes and methods. This watch is covered by our standard movement warranty. If your purchase does not meet expectations, review our return and exchange policy for available options.










1 review for Replica Rolex Lady-Datejust 178240 Blue Dial 31mm