Series : LADY DATEJUST
Model Number : 178240BK
Movement : Automatic
Power Reserve : Caliber Rolex 2235, 48Hours
Case Diameter : 31mm
Factory : Clean Factory / VSF(VS Factory)
Crystal : Scratch-Resistant Sapphire Crystal
Dial Colour : Black
Strap Colour : Silver
Strap Material : Stainless Steel
Clasp : Folding Clasp
Power Reserve on This Reference
Community QC discussions make power reserve a practical question for 178240BK, but not an answer. Use those discussions to identify the disputed interface, obtain a oblique interface view, and return to the genuine same-reference watch for the technical baseline.
Lug Curvature on This Reference
Lug Curvature is the first evidence channel for 178240BK. Verify its interface against a same-generation genuine reference, using the Black only where the dial actually controls the comparison. A oblique interface view is preferable when the existing image hides depth or alignment.
Mid-Case Mass
Use mid-case mass to challenge the internal consistency of 178240BK. The Black, Stainless Steel, and stated Automatic should tell a compatible reference story where they intersect with this topic. A conflict deserves a targeted follow-up rather than a forced conclusion.
Bracelet Taper
Use bracelet taper to challenge the internal consistency of 178240BK. The Black, Stainless Steel, and stated Automatic should tell a compatible reference story where they intersect with this topic. A conflict deserves a targeted follow-up rather than a forced conclusion.
Bezel Registration
Community QC discussions make bezel registration a practical question for 178240BK, but not an answer. Use those discussions to identify the disputed architecture, obtain a side elevation, and return to the genuine same-reference watch for the technical baseline.
















Kevin Walker –
The listing caught my attention, so I gave this version a shot. Delivery was pretty uneventful, and the package arrived fine. That’s really all I was looking for. I’m happy enough with the purchase.