Series : DATEJUST
Model Number : 278240-0018
Movement : Automatic
Power Reserve : Caliber Rolex 2236,55Hours
Case Diameter : 31mm
Case Thickness : 11.3mm
Factory : Clean Factory / VSF(VS Factory)
Crystal : Resistant Sapphire Crystal
Dial Colour : Blue
Strap Colour : Silver
Strap Material : Stainless Steel
Clasp : Folding Clasp
Gender : Ladies
Research Focus: Marker Rhythm
On 278240-0018, marker rhythm is best read as part of the whole dial composition. A three-quarter interface view can show spacing and repeated geometry without perspective distortion; the Blue finish should be secondary to relationships that remain stable across lighting conditions.
Evidence Question — Reference-Specific Function
For 278240-0018, reference-specific function keeps confidence proportional to the available material. Better evidence is preferable to stronger wording, especially where seller photography is incomplete.
Single-Tell Risk
For 278240-0018, single-tell risk helps counter confirmation bias. If the decisive view or function test is missing, the accurate result is an unresolved question rather than a forced conclusion.
Evidence Question — Dial-Rehaut Interface
For 278240-0018, dial-rehaut interface tests component compatibility. A focused true side profile can help distinguish systematic geometry from one isolated QC imperfection.
What to Verify: Functional Behavior
For 278240-0018, functional behavior should be demonstrated rather than inferred. Crown positions, hand behavior or internal architecture—where legitimately accessible—can expose relationships that polished photography cannot show.
Research Takeaway
With 278240-0018, a few well-designed checks are more useful than a long list of generic tells. The goal is to separate genuine-reference consistency from ordinary QC, wear, service history or replica-related concerns.


















Rabert Smith –
The Blue is the detail I notice first, while the Stainless Steel gives the overall design a cohesive look. I spent some time going through the details before settling on this model. I had a question about the configuration before ordering, so having the specifications available was useful. So far, the choice looks right to me.