Setting the bezel makes this dial harder to see as purple, not easier. Reference 278341RBR is the 31mm Datejust in a combination of stainless steel and Everose gold with a domed bezel set with diamonds, and this configuration carries an aubergine dial with a full Roman sequence whose large VI is set with diamonds, on the Oyster bracelet. Aubergine is mixed deep enough that it reads as a very dark neutral in ordinary indoor light and only resolves into purple when something bright reaches it directly. Ringing it with diamonds raises the brightness immediately around it, and the eye adjusts to the brighter of the two, which pushes the dial further toward black than it would sit on its own. The color is still there. It simply has to work harder to be seen, and on most days it is not.
Aubergine is mixed deep enough that it has no pale range, and the bezel exploits that. The lacquer goes on opaque in thin coats so the tone holds even across the curve of the dial, and because the color sits so low it returns very little of the light reaching it. Immediately outside the crystal the opposite is true. The bezel is a dome rather than a flat ring, so its stones sit at continuously varying angles and only an arc of the band is lit at any moment, with that arc traveling as the wrist turns, and the polished metal between the settings returns light as well. What the combination produces is a bright rim around a dark opening, which makes the watch read less like a face and more like something seen through a window. That is a specific effect and it suits this ground better than any other on the reference. Everose numerals separate cleanly from aubergine at every angle, unlike the same numerals on a matched dial, so the face stays legible even at its darkest. The stones inside the large VI are set into the numeral itself rather than into separate mounts. Everose is alloyed with platinum so the tone holds instead of drifting toward yellow over decades. Steel takes the case body and the outer bracelet links while Everose takes the bezel, the crown, the bracelet center rows, the numerals and the hands, all of it solid rather than plated. The Oyster bracelet is three broad flat links, brushed on top with polished flanks, closing on a concealed clasp.
The watch runs one complication and it is the reason the model has a name. The date changes instantaneously at midnight rather than creeping through the hours around it, which is the function the Datejust introduced in 1945. Its disc is matched to the aubergine ground rather than left pale, and on a dial that spends most of its time reading as black that matching does more work than it would on a lighter one, since a pale disc would sit in the middle of the face as the brightest thing inside the crystal. The frame around the window is drawn for a 31mm dial rather than reduced from a wider one, which keeps it from pressing against the numerals at its shoulders. Above it the Cyclops lens, fitted to the model since 1953, enlarges the numeral roughly two and a half times, and on a dark dial that magnification is the difference between a date that is read and one that is worked out. 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.
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, since warmth was the point of the alloy. Aubergine is the exception and has stayed a minority option because of it. Within the generation, 278341RBR is the steel and Everose reference with a diamond-set domed bezel, and 278241 offers the identical dial under a plain dome. The bezel is also the one element on this watch a buyer cannot reconsider without changing reference entirely, since the dial and the bracelet vary within a reference while the bezel is what defines one. That makes it the first decision rather than the last, which is the reverse of how most people approach the configuration.
The buyer for this is not choosing aubergine to be seen. Anyone who wanted a purple watch would specify it under a plain bezel, where the color has room to resolve, and choosing it here means wanting a dark dial with something held in reserve rather than a colored one. That is a real preference and a quiet one. What the configuration gives in exchange is the strongest framing effect the reference produces, a bright band around an opening that gives almost nothing back, and on the Oyster bracelet the rest of the watch stays plain enough to let that stand. The set numeral is the only thing on the dial doing what the bezel does. Buyers arrive here from the plain-bezel aubergine having decided the watch needed presence at distance, and occasionally from the chocolate dial wanting something cooler under the same rim. Very few set out to buy this exact watch, and most of the people who own one describe having found it rather than chosen it.
