Rolex Datejust 31 Yellow Rolesor — 24-Diamond Bezel, Silver Diamond Dial | Ref. 178343

The reference 178343 Datejust 31 in Yellow Rolesor marries Oystersteel's functional resilience with the warmth of 18-carat yellow gold in a 31 mm case configuration ideally proportioned for a mid-size dress watch. Twenty-four round brilliant diamonds, individually set in the domed 18-carat yellow gold bezel, create a continuous arc of prismatic light that encircles the dial — a level of gem-setting intensity that requires Rolex's in-house lapidaries to align each stone to within fractions of a millimetre. The silver lacquered dial below carries diamond hour markers in place of applied batons, delivering a consistent gemological language from bezel to chapter ring.

Calibre 2235 — predecessor to the current 2236 — provides the mechanical foundation, its bidirectional Perpetual rotor sustaining approximately 48 hours of power reserve through the wearer's daily activity. The movement's date mechanism advances instantaneously at midnight, the date disc cycling through a rapid jump that Rolex achieves via a specially engineered spring-loaded cam system. A Cyclops lens integrated into the scratch-resistant sapphire crystal magnifies the date window 2.5× for comfortable reading without disturbing the dial's visual balance.

The Oyster bracelet in Oystersteel and yellow gold — its alternating polished and satin-brushed centre and outer links mirroring the bicolour case — is secured by the folding Oysterclasp with a 5 mm Easylink comfort extension system. Water resistance to 100 metres, ensured by the Twinlock screw-down crown in yellow gold, positions this Datejust equally well for travel and daily wear. The ref. 178343 occupies a sweet spot in the Datejust hierarchy: diamond-set and thoroughly bejewelled, yet grounded in the practical Oystersteel architecture that has made the Datejust the world's most enduring watch reference.