Rolex Datejust 31 Yellow Gold — 48 Diamond Bezel Black Index Dial | Ref. 178288

Reference 178288 is a full yellow gold Datejust 31 fitted with a 48-diamond bezel and a black index dial — a configuration that places it firmly in the decorative tier of the 31 mm Datejust range, where the watch's jewellery credentials are given equal billing with its timekeeping function. Yellow gold and black is a combination of enduring formal elegance, the warm luminosity of 18 ct gold throwing the depth of the black dial into sharp relief.

The 178xxx reference prefix places this watch in the pre-2020 generation of the Datejust 31, powered by Calibre 2235 — the forerunner to today's 2236. The 2235 is a thoroughly proven automatic movement, COSC-certified, offering approximately 48 hours of power reserve and reliable performance across decades of use. The 31 mm yellow gold case maintains Rolex's Oyster architecture with 100-metre water resistance; the factory-set 48-diamond bezel — each stone individually selected for cut, colour, and clarity — adds brilliance at the case's outer edge while the black dial creates strong tonal contrast for the applied gold hour markers. The President bracelet in yellow gold, typically paired with gold Datejust references, completes the watch with the same material consistency that defines its case.

Factory diamond bezels on full yellow gold Datejust references from the 178xxx generation maintain strong secondary market demand, particularly in configurations where the dial colour provides strong contrast. The black index dial on the 178288 is a collector-friendly choice: bold enough to satisfy those who want their watch to make a statement, conservative enough to integrate into formal wardrobes across multiple decades. It is a reference that has aged well.