Series : LADY DATEJUST
Model Number : 178273NGBK_J
Movement : Automatic
Power Reserve : Rolex Caliber 2235, 48Hours
Case Diameter : 31mm
Case Thickness : 11.4mm
Factory : Clean Factory / VSF(VS Factory)
Crystal : Scratch-Resistant Sapphire Crystal
Dial Colour : Black
Strap Colour : Silver & Gold
Strap Material : 18kt Gold & Steel
Clasp : Folding Clasp
Calendar Transition Behavior
This component interface study makes calendar transition behavior the main question for 178273NGBK_J. Compare the feature with a verified same-generation example and use the Black, 31mm and 18kt Gold & Steel only where they materially affect the result.
Digital Sharpening Artifacts
The 31mm format of 178273NGBK_J provides proportion context for digital sharpening artifacts. Work from silhouette and relative geometry rather than attempting precise measurements from an unscaled photograph.
Component Interface Study — First-Link Articulation
Begin the 178273NGBK_J review with first-link articulation, not with overall visual similarity. A square-on macro should expose the relevant geometry while limiting perspective and reflection errors that can make a correct feature look wrong.
Evidence Question: Power-Reserve Claim
The 31mm format of 178273NGBK_J provides proportion context for power-reserve claim. Work from silhouette and relative geometry rather than attempting precise measurements from an unscaled photograph.
Fluted-Bezel Facet Structure Study
This component interface study makes fluted-bezel facet structure the main question for 178273NGBK_J. Compare the feature with a verified same-generation example and use the Black, 31mm and 18kt Gold & Steel only where they materially affect the result.


















Dovid Scatt –
I paid more attention to the specifications than the marketing description when choosing this one. The 18kt Gold & Steel and 18kt Gold & Steel make the watch feel visually coordinated rather than pieced together. The overall package is well balanced on paper and in the initial impression.