Chocolate is built plain at six case sizes and skips exactly one of them. The ground appears unset at 28mm, 36mm, 37mm, 40mm, 41mm and 42mm, and at 31mm it exists only with diamonds, which is the single gap in an otherwise continuous run. Reference 126301 is the 41mm Datejust in a combination of stainless steel and Everose gold, carrying a smooth bezel, and this configuration pairs a plain chocolate dial with applied gold markers and a Jubilee bracelet. At this size the ground belongs to the two Everose references and to no other case the model is built in.
The case is forty-one millimeters in steel with an Everose gold bezel, crown and center links, and the bezel is smooth rather than fluted, which at this size is the quieter of the two rims the model offers. A smooth bezel in gold reads as a single unbroken band of warm metal around the dial; a fluted one breaks that band into a repeating pattern of light and shadow. The dial is chocolate, a deep warm brown developed alongside the Everose alloy and pitched to sit with it, and applied gold markers stand at the hours, faceted and raised off the surface. Brown against rose gold is a narrow tonal gap, so the markers separate by height and by the shadows they cast rather than by contrast, and the dial reads as one warm field with structure in it rather than as a background with objects on it. The Jubilee is built from five-piece links with the gold running in three narrow inner strips, which keeps the metal broken into small units and makes the bracelet more articulated and more reflective than an Oyster. On a dark warm dial that matters: the bracelet returns light in many small pieces and the dial returns very little, so the wrist is bright and the face is not. At forty-one millimeters that split is more pronounced than it would be on a smaller case, since the bracelet occupies proportionally less of the watch and the dial proportionally more, and a dark ground at this diameter is a large quiet area by any measure.
Hours, minutes, running seconds and a date advancing in a single step at midnight rather than easing across into the day that follows. The self-winding movement in the 41mm case holds roughly seventy hours of running time, which is a different movement from the one in the smaller Datejust cases and gives noticeably more reserve. The date sits at three under a magnifying lens, and on a dark ground the white disc is the brightest thing on the dial, brighter than the gold markers. That is the one relationship this configuration cannot adjust. What the applied markers contribute is a reading order rather than information: they establish where the hours are without saying which hour each one is, so the dial is taken in as a whole and the time comes from the angle of the hands. On a low-contrast warm dial that method works better than it sounds, because the markers are polished gold catching light from the side while the ground stays matte, and the separation is one of finish rather than of tone. In flat light the watch is genuinely quiet and reads slowly; in direct light the markers pick out immediately and the dial becomes legible at a glance. That swing is wider on this ground than on any other unset dial the reference builds, because the other five are pale enough that their markers never need the help.
The 41mm Datejust is a six-reference family and it is built very differently from the smaller cases. There is no solid gold version, no bezel set with diamonds and no President bracelet; every reference comes in steel or in one of the three two-metal combinations, with a smooth or a fluted rim and a choice of Jubilee or Oyster. Steel is offered with the smooth rim alone and the white gold combination with the fluted one alone, while the two warm combinations get both. This reference is the smooth Everose one and 126331 is its fluted twin, carrying the same eight grounds. Chocolate is one of four of those eight belonging to Everose at this size, alongside the set version of the same ground and the two sundust dials; the other four are shared more widely. Across the range chocolate follows the alloy without exception: twenty-three references carry it, from the 28mm cases through to the 42mm ones, and every one of them is either solid Everose or the steel and Everose combination. It is the clearest example the catalogue has of a color built for one metal. The practical effect for a buyer is that a brown Datejust is always a rose gold Datejust, and the ground can be used as a shortcut for identifying the alloy in a photograph where the metal itself is hard to judge.
This is the most restrained watch the reference builds. No stones, no numerals, no bright surface anywhere except the bracelet, and a dial that gives up almost nothing in ordinary light. On a forty-one millimeter case that produces a watch large enough to be noticed and quiet enough not to be examined, which is a combination the smaller Datejust cases cannot really offer. Anyone who wants the same ground with some brightness under the glass should take the set version, built on this reference with twelve diamonds at the hours. Anyone who wants the warm metal to work harder should take the fluted twin, 126331, where the same dial sits under a rim that breaks light instead of holding it. And anyone who wants the watch to sit quieter on the wrist should take the Oyster, which keeps the gold in one continuous line rather than three narrow strips and reflects considerably less.