Slate is the only dial on this reference where the gold markers read as gold. Reference 278241 is the 31mm Datejust in a combination of stainless steel and Everose gold with a plain domed bezel, and this configuration carries a slate dial with applied hour markers and no stones anywhere on it, on the Oyster bracelet. On the chocolate ground the Everose markers sit within a shade of the surface and nearly merge with it. On the rose ground they disappear into it almost entirely. Slate is the one cool ground the reference offers, and against it the markers are not merely brighter than the dial but a different color from it. That is the difference between seeing a marker and seeing what a marker is made of.
Gold has a color as well as a brightness, and most dials only let you see the brightness. Slate lets you see both, and the finish of the ground is what makes it legible. It is a sunray dial rather than a flat lacquer, brushed outward from the center so the surface is never one tone at any single moment. One side of the dial catches light while the opposite side holds shadow, and the boundary between them travels as the wrist turns. The applied markers cross that gradient. Some sit on the bright half and some on the dark half, and which is which changes continuously, so a marker that was barely separating a moment ago becomes the most obvious thing on the face. Nothing on a flat ground behaves that way. The sunray texture is cut into the dial blank beneath the finish rather than applied over the top of it, which is why it does not wear away with handling. The markers themselves are solid Everose applied to the dial rather than printed, carrying height and casting edges, and the hands are the same alloy drawn for this case width rather than scaled down from a wider one. Steel takes the case body and the outer bracelet links while Everose takes the bezel, the crown, the bracelet center rows, the markers and the hands, all of it solid rather than plated. The bezel is a smooth polished dome carrying nothing. The Oyster bracelet is three broad flat links, brushed across the top with polished flanks, closing on a concealed clasp.
The watch does one thing beyond telling the time. The date changes instantaneously at midnight rather than creeping through the hours around it, the function the Datejust introduced in 1945 and takes its name from. Its disc is matched to the slate ground rather than left pale, which matters more on a sunray dial than on a flat one, since a mismatched window would sit at a fixed brightness while everything around it kept changing. The frame is drawn for a 31mm dial rather than reduced from a wider one, so it stays clear of the markers at its shoulders, and the Cyclops lens above it, fitted to the model since 1953, enlarges the numeral roughly two and a half times. Correction runs through the winding crown at a dedicated position and leaves the hands where they are. The movement is self-winding with a power reserve of approximately 55 hours, built for a case this narrow rather than carried down from a wider one, since a smaller barrel stores less energy and a lighter rotor takes in less of it from the same arm. The crown screws down against the case, and the bracelet folds shut on itself. Nothing about that changes across the seven grounds this reference builds.
The Datejust has been in production since 1945, when it became the first self-winding wristwatch to show the date through a window on the dial. 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, on the reasoning that steel supplies the structure and gold supplies everything the eye takes in. Everose arrived in 2005, and most of the dial colors developed around it since have been warm ones, since warmth was the point of the alloy. Slate is one of the few exceptions and has been kept in the range across generations rather than rotated out, which is unusual for a grey. Within the generation, 278241 is the steel and Everose reference with a plain domed bezel, and slate appears on it twice: this version with applied markers, and a version carrying Roman numerals with the large VI set with diamonds. The plain one is the older idea of the two and by some distance the more common. Slate is one of two grounds at this reference the catalogue offers both plain and set, rose being the other, and every ground here is available on either bracelet.
The buyer for this wants a two-tone watch that does not read as a warm watch. Everose on its own pushes hard in one direction, and every other dial the reference offers pushes with it. Slate is the only one that holds still, so the gold ends up looking like a material the watch is made of rather than the mood it is in. That distinction matters to people who would not otherwise consider rose gold at all, and it is why this configuration sells to buyers who arrived intending to look at steel. The Oyster bracelet reinforces it, being the plainer of the two and built for daily wear rather than for occasions. There are no stones anywhere on the watch. Buyers who want the same dial with something on it move to the set version, and those who want more warmth move to chocolate, but a good number of people who see slate against Everose stop there and stop looking. It is also the version most often bought without much deliberation, since the case and the dial settle their relationship immediately and there is nothing left on the watch to weigh afterward.
