Series : LADY DATEJUST
Model Number : 178240BKRN
Movement : Automatic
Power Reserve : Caliber Rolex 2235, 48Hours
Case Diameter : 31mm
Factory : Clean Factory / VSF(VS Factory)
Crystal : Resistant Sapphire Crystal
Dial Colour : Black
Strap Colour : Silver
Strap Material : Stainless Steel
Clasp : Folding Clasp
Case Silhouette
Use case silhouette to study the silhouette of 178240BKRN. The 31mm specification provides context, but relative curvature, taper and transitions are more reliable than estimating dimensions from a photograph. Wear or refinishing must remain possible explanations.
Brush Direction
For 178240BKRN, brush direction keeps confidence proportional to the available material. Better evidence is preferable to stronger wording, especially where seller photography is incomplete.
What to Verify: Bezel-Crystal Stack
The listed bezel makes bezel-crystal stack a natural geometric reference on 178240BKRN. Compare frontal registration with a true side profile; construction and stacking are generally more reliable than perceived color or reflection.
Research Focus: White-Balance Control
For 178240BKRN, white-balance control should be treated as part of the evidence process. The Black and surrounding metal may change with exposure and reflection, so stable geometry should outrank a single photographic impression.
Evidence Question — Case-Bracelet Proportion
The Stainless Steel on 178240BKRN is part of the case architecture, making case-bracelet proportion a useful interface check. Compare both sides, articulation and transition geometry; one imperfect junction may be QC, while repeated inconsistency is more informative.


















Jahn Green –
The Stainless Steel and Stainless Steel make the watch feel visually coordinated rather than pieced together. I chose this one mainly because the specifications fit what I was looking for. Delivery was uneventful, which is exactly what I want from an online purchase. I’m satisfied with the specification and presentation.