Black dials have a way of making any Rolex look more assertive, and the Lady-Datejust 178240 in black delivers that effect at the mid-size 31mm scale. The absence of colour on the dial draws attention to the watch’s structural details: the clean line of the smooth bezel, the crisp applied markers, and the rhythmic links of the Jubilee bracelet. For wearers who prefer dark-dial watches but want something more compact than a 36mm, this configuration strikes the right balance.
Key Specifications
| Specification | Detail |
|---|---|
| Reference | 178240 |
| Case Size | 31mm |
| Case Material | Oystersteel |
| Bezel | Smooth domed, steel |
| Dial | Black |
| Crystal | Sapphire with Cyclops lens |
| Movement | Automatic with date |
| Water Resistance | 30m |
| Bracelet | Jubilee, five-piece links |
| Clasp | Concealed folding Crownclasp |
| Functions | Hours, minutes, seconds, date |
The 178240 Black Up Close: Case, Dial and Bracelet
The black dial creates maximum contrast with the Oystersteel case and applied steel hour markers, making the watch easy to read at a glance. Luminescent fill on the hands and markers ensures visibility in low light. The date window at three o’clock is magnified by the Cyclops lens sitting atop the flat sapphire crystal.
The smooth steel bezel gives this reference a streamlined look, pairing naturally with the dark dial for a monochromatic effect that is both modern and versatile. The Jubilee bracelet, with its five-piece links and concealed clasp, adds a dressy dimension that softens the sporty character of the smooth bezel. Explore more dark-dial ladies’ watches in the Lady-Datejust collection.
Movement Options: Swiss vs Japanese
This replica is offered with two movement tiers to suit different expectations:
- Swiss automatic — smooth high-beat sweep with extended power reserve and architecture that follows the genuine caliber design closely. Recommended for collectors who value horological precision.
- Japanese automatic — Miyota-based movement with strong reliability and straightforward worldwide servicing. A proven daily performer that delivers consistent accuracy.
Both feature quickset date and hacking seconds for precise synchronisation.
Shipping, Warranty and Returns
All watches ship in discreet packaging with full tracking from our warehouse to your door. Delivery estimates by region are listed on our shipping policy page. Each timepiece includes our standard movement warranty for added confidence. If the watch does not meet your expectations, consult our return and exchange policy for next steps.










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