Rolex Steel and Yellow Gold Datejust 31 Watch - Diamond Bezel - Dark Mother-of-Pearl Diamond Dial - Oyster Bracelet - 278383RBR dkmdoPowered by Rolex's perpetual, self winding caliber 2236 movement with a 55 hour power reserve, this Datejust 278383RBR combines the precision engineering collectors expect with the striking visual drama of a dark mother of pearl diamond dial set within a 31mm yellow gold case. The diamond set bezel creates a brilliant frame that amplifies the natural iridescence of the dark nacre, while the robust Oyster bracelet maintains the collection's utilitarian

while the robust 28mm case delivers contemporary presence on the wrist

enhanced by a solid case back and screw-down crown

Transparent Caseback — Exhibition caseback reveals the automatic chronograph caliber and its finishing details

and Parachrom blue hairspring for superior magnetic resistance and temperature stability

This 42mm rose gold case houses a striking blue dial that presents local and home time zones with unprecedented clarity

creates the signature sparkle that distinguished this reference from its steel-only predecessors

Diamond Hour Markers — Eight precisely cut diamonds mark the primary time positions

creating subtle variations in luminosity throughout the day

The stark contrast between the deep black index dial and the brilliant white gold case creates a compelling visual tension that collectors have consistently favored since this reference's introduction in 2005

Mounted on the iconic three-piece link President bracelet

40mm Presidential Proportions — Modern case sizing that balances wrist presence with everyday wearability

28mm Yellow Gold Case — Solid 18k yellow gold construction in Rolex's smallest modern Datejust proportions