Series : LADY DATEJUST
Model Number : 178241BKNR_O
Movement : Automatic
Power Reserve : Caliber Rolex 2235, 48Hours
Case Diameter : 31mm
Case Thickness : 11.4mm
Factory : Clean Factory / VSF(VS Factory)
Crystal : Resistant Sapphire Crystal
Dial Colour : Brown
Strap Colour : Silver
Strap Material : 18kt Rose Gold & Steel
Clasp : Folding Clasp
What to Verify: Service-Part Possibility
Condition complicates service-part possibility on 178241BKNR_O. Wear, polishing and service replacement can alter the same details used in authentication, so original manufacture should be separated from later intervention before origin is discussed.
Research Focus: Minute-Track Registration
On 178241BKNR_O, minute-track registration is best read as part of the whole dial composition. A neutral frontal frame can show spacing and repeated geometry without perspective distortion; the Brown finish should be secondary to relationships that remain stable across lighting conditions.
Evidence Question — Crown Placement
Use crown placement to study the silhouette of 178241BKNR_O. 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.
Evidence Question — Case-Bracelet Interface
The 18kt Rose Gold & Steel on 178241BKNR_O is part of the case architecture, making case-bracelet interface a useful interface check. Compare both sides, articulation and transition geometry; one imperfect junction may be QC, while repeated inconsistency is more informative.
What to Verify: Case Silhouette
For 178241BKNR_O, case silhouette should be compared from a three-quarter interface view. Structural form survives lighting changes better than surface shine, making it a stronger reference-specific clue.


















Kevin Jahnsan –
I spent some time going through the details before settling on this model. The listed power-reserve specification is another detail I paid attention to because I prefer knowing what the movement specification is. I liked having the material and movement information spelled out rather than having to guess. The details are what make this version work for me.