Rolex Steel and Yellow Gold Datejust 31 Watch - Domed Bezel - Black Index Dial - Oyster Bracelet - 178243 bkioSlipping the black index dial of this 31mm Datejust onto the wrist delivers the perfect marriage of Rolex's steel construction with yellow gold accents, creating a presence that commands attention without overwhelming. The Rolex Datejust 178243 represents the sweet spot in the collection's sizing evolution, where the substantial feel of precious metal meets the refined proportions that defined luxury sport watches of the era. Against the deep black

Black Diamond Dial — Ten brilliant-cut diamonds mark the hours against a deep black backdrop

where each baguette-cut diamond serves as both hour marker and architectural element

transforming Gérald Genta's iconic porthole design into a 40mm white gold canvas entirely draped in diamonds

Oyster Bracelet — Three-piece solid link construction with Oysterclasp and Easylink comfort extension system

Silver Diamond Star Dial — Lustrous silver-toned dial featuring applied diamond hour markers arranged in star formations

delivering a 72-hour power reserve through its column wheel and vertical clutch architecture

Rolesor Construction — Steel and yellow gold combination showcasing Rolex's mastery of two-tone case architecture in the compact 28mm diameter

Unworn Condition — Complete with factory stickers

with case thickness optimized for daily wear comfort

offering superior legibility against the warm rose gold case

Domed Bezel Configuration — Smooth Everose gold bezel with polished finish

combining the warm luxury of Everose gold with the sporty elegance of stainless steel in a perfectly proportioned 36mm case