The most gold and the most color the reference can carry at once. Reference 278243 is the 31mm Datejust in a combination of stainless steel and yellow gold with a domed yellow gold bezel, and this configuration pairs an olive green dial set with diamond markers with the Jubilee bracelet. The marker version leaves more of the dial exposed than the Roman version does, so the color runs nearly uninterrupted, and the Jubilee puts more gold across the wrist than the Oyster does, so the metal is delivered continuously rather than in a single band. Both halves of the watch are running at their maximum.
That combination also produces the warmest reading of olive available anywhere in the range. The color contains enough brown to move in whichever direction the surrounding metal pushes it, and yellow gold pushes harder than any other case Rolex builds, so the more gold is visible the further the dial travels toward khaki. On the Oyster a broad band of brushed steel holds some of that in check, and the Jubilee removes the check entirely, alternating yellow gold center rows with steel outer links across five rows so the eye receives gold continuously. Because yellow gold sits nowhere near steel in color that alternation reads as a clear boundary between materials rather than as a change in finish. The bracelet carries roughly twice the component count of the Oyster across the same width, which is why it articulates more finely and follows a wrist more closely, and the gold is solid rather than plated or capped. Rolex matches the polish on the center rows to the polish on the bezel so the metal reads as one material distributed rather than as separate applications of it. The lacquer is applied in several thin coats to keep the tone even across a curved surface, and against it the diamonds carry moderate contrast, punctuating the color rather than competing with it. The markers stand slightly proud of the surface with the settings kept low and tight. The date sits at three under the Cyclops lens on a matched disc. Rolex matches the height of the marker settings to the height of the date frame as well, so the dial reads as one plane with elements standing off it rather than as several plates at different levels, and the hands are polished yellow gold drawn for this case size rather than scaled from a larger one. The lugs are finished so the bracelet meets the case without a visible gap at any angle of articulation.
Rolex matches the date disc to the dial rather than leaving a paler window in a colored surface, and a single aperture keeps the marker ring uninterrupted where a second would break a pattern depending on continuity. The Cyclops lens above it has been part of the Datejust since 1953 and magnifies the date roughly two and a half times, which makes a small window readable without enlarging it and unbalancing the dial. The date changes instantaneously at midnight rather than creeping through the surrounding hour, the feature the model introduced in 1945 and the reason it carries the name it does. Correction runs through the winding crown without advancing the hands, and nothing the watch asks for requires a tool. The movement is self-winding with a power reserve of approximately 55 hours, engineered into a movement built to fit a 31mm case rather than carried down from a larger one, since a smaller barrel stores less energy and a proportionally smaller rotor supplies less of it. The rotor winds in both directions rather than only one. The crown screws down against the case, and the Jubilee closes with a concealed clasp folded away inside the links. Correction takes seconds and requires no tool, which on a bracelet carrying this many components matters more than it would on a simpler one. Hand winding runs through the same crown, and the watch takes to being worn better than to being rotated, since a smaller rotor gathers less energy from the same movement.
The Datejust arrived in 1945 as the first self-winding wristwatch to show the date in a window, and the Jubilee was introduced the same year for that watch, which makes it native to the model. The 31mm case sits between the 28mm Lady-Datejust and the 36mm original, and the 278000 generation replaced the 178000 series in 2018 with a revised case and bracelet. Rolex registered the name for its steel and gold construction in 1933. Green reached the Rolex catalogue broadly over the past decade and came to this model later than most colors, so this configuration pairs the newest ground in the range with the oldest bracelet the watch has worn and the most emphatic metal it is built in. Within the generation, 278243 is the steel and yellow gold reference with a domed bezel. Gem-set dials have been part of the model for most of its history, and the marker-only arrangement is the more common of the two forms Rolex offers here. Olive green is one of three grounds this reference builds in two set arrangements, dark grey and silver being the others, so each of the three takes four rows against two for every other ground here.
The buyer for this is not asking the watch to be restrained about anything. Of the four olive configurations across this reference and its domed siblings, this is the one that shows the most color, delivers the most gold and imposes the least order, which makes it the most emphatic and the least formal of them. That is a coherent position rather than an absence of one. Anyone considering it should see it against the Oyster version first, since the bracelet changes the dial here more than it does on any neutral ground, and the two are genuinely different watches rather than two finishes of the same one. It is also the configuration on the reference that photographs least like it wears, since no image can show how much the bracelet is doing to the dial. Eighteen of the twenty-two rows here carry stones on the dial, and olive green is never built plain.
