Rolex Day-Date President 40mm Onyx Baguette Diamond Dial Yellow Gold

The Rolex Day-Date 40 Ref. 228238A represents precious metal elegance with exotic stone dial in 18k yellow gold. This timepiece features black onyx dial with ten baguette diamond hour markers. Manufacture Caliber 3255 delivers 70 hours power reserve with new-generation architecture. Fluted bezel in 18k yellow gold creates signature visual identity. President bracelet with semi-circular three-piece links maintains iconic Day-Date aesthetic. Water resistance to 100 meters maintains Oyster case heritage.

Day-Date 40 introduced around 2015 updated case diameter from 36mm traditional sizing with Caliber 3255 replacing previous 3155 generation. Reference 228238A features factory onyx dial with channel-set baguette diamond hour markers. Caliber 3255 contains 31 jewels beating at 28,800 vph with improved Chronergy escapement and extended power reserve. Onyx requires careful selection and cutting creating perfectly flat surface. Day display arc at 12 o'clock shows full spelling while date appears at 3 o'clock with Cyclops magnification. Fluted bezel requires specialized tools preventing unauthorized removal.

President bracelet in 18k yellow gold features concealed Crownclasp with Rolex coronet opening. Yellow gold construction throughout case, bezel, and bracelet creates unified precious metal presentation. Black onyx with diamond markers creates high contrast legibility suitable for formal occasions. This preowned example represents accessible Day-Date ownership with exotic dial treatment beyond standard metal dial options. Factory onyx and diamond specification maintains Rolex quality standards appealing to collectors valuing distinctive aesthetics. Yellow gold remains most traditional Day-Date configuration worn by presidents and world leaders for seven decades.