White is the least forgiving dial color Rolex produces and the hardest one to look at closely. A plain white lacquer surface has nothing in it to absorb a flaw, no grain, no gradient, no stone and no sparkle, so any unevenness in the coating or any imprecision in how a marker is planted announces itself immediately. Reference 128399TBR is the 36mm Day-Date in white gold with diamonds set into the bezel and continuing down onto the lugs, and this configuration puts a white dial with applied Roman numerals inside all of that. It is one of only three dials on the reference that carries no stones at all, and the only one of those built on a solid white ground. Everything decorative on the watch happens outside the dial, which is a deliberate inversion of how most gem-set watches are specified.
The case is 36mm in white gold, the original Day-Date proportion and the one the President bracelet was drawn around. Its bezel is set with diamonds and the setting continues across the lugs, so the stones trace the outline of the case rather than sitting in a ring on top of it. Seen from directly above, the watch reads as a bright frame around a white field. Seen from the side, the lugs are where most of the light comes from. Inside that frame the dial is flat white with applied Roman numerals in white gold, each numeral faceted so it catches light along its length rather than reflecting as a flat shape. Roman numerals occupy more of a dial than any other marker set Rolex uses, and on a white ground they read as black at a glance because of the shadow they throw rather than because of any printing. The day aperture sits at twelve and the date at three beneath the Cyclops lens, both framed cleanly against the lacquer. The bracelet is the President, semi-circular three-piece links in matching white gold with a concealed clasp that keeps the line of the links unbroken. There is no color anywhere on the watch, which is unusual even within the Day-Date catalogue. Applied numerals also throw a real shadow onto the lacquer beneath them, and on a white dial that shadow is the only tonal variation across the entire surface, which is a large part of why the dial does not read as empty.
The day disc can be ordered in any of a long list of languages, chosen when the watch is specified, and it remains one of the few points where a buyer can make a production Rolex particular to them. On a dial this plain the choice matters more than usual, because the word at twelve is the only text of any length on the watch and it sits in the most visible position. The day of the week is written out in full rather than abbreviated to three letters, which is the feature the model was built around in 1956, and the date sits at three. Both discs change instantaneously at midnight rather than drifting through the hours on either side of it. The movement is self-winding with a power reserve of approximately 70 hours, which covers a weekend off the wrist without needing to be reset. Both calendar displays are corrected through the winding crown without moving the hands. The Cyclops lens magnifies the date, and against white lacquer the magnified numeral is about as legible as a date window gets. The crown screws down against the case and the President clasp folds away inside the links. Rolex prints both discs in black on this configuration, matching the shadow the numerals cast rather than introducing a second color into the watch.
The Day-Date has been produced only in gold and platinum since 1956, when it became the first wristwatch to spell the day of the week out in full. That decision, and the refusal to make the model in steel, established it as the dress watch in a catalogue otherwise built on tool watches, and the Roman numeral dial belongs to that side of the model more completely than any other marker set. Rolex has offered Romans on the Day-Date across most of its generations, and they have never been the volume seller, which is a large part of why they still look considered rather than default. The 128000 generation replaced the 118000 series in 2019 with a revised case profile, a cleaner bracelet taper and a longer running time. Within the generation, 128399TBR is a white gold reference where the diamond setting runs past the bezel and onto the lugs, and it is offered across a wide range of dials, most of them set or cut from stone. This white Roman configuration is the plainest of them by a considerable margin. A plain dial inside a set case also has an older precedent in the model than the reverse arrangement does, since the earliest gem-set Day-Dates left the dial alone entirely.
The buyer for this is someone who wants a set case and a dress dial and has no interest in reconciling the two. The result is a watch that looks formal from the front and expensive from the side, which is a specific effect and not one most references can produce. It also happens to be the easiest configuration on the reference to wear daily, since a white lacquer dial with Roman numerals asks nothing of the light and reads instantly in any condition. Collectors who own several Day-Dates tend to keep one plain example for exactly that reason, and among the plain options on this reference this is the most formal. At 36mm on the President bracelet it sits comfortably under a cuff and reads correctly with tailoring, which is what the model was designed to do before the gem-setting was ever an option. It is the configuration on this reference most likely to be bought to be worn rather than kept.
