This is the only dial in its case group that was made rather than found, and that distinction is the whole argument for it. The other three references on the 26396 case use natural materials, a stone with veining, a stone without, and a slice of iron meteorite. This one uses aventurine, a glass containing suspended metallic particles, which is then enamelled in green and smoked so the surface darkens towards its edge. Every stage of that is a decision taken by a person, where the natural dials are a matter of selection rather than design. The case is black ceramic at 41 mm. Aventurine also has a history worth knowing, having been produced in Venice from the seventeenth century after the effect was discovered by accident, and its name derives from that accident rather than from any property of the material. It has been used in watchmaking for decades as a substitute for a night sky, and using it as a green ground rather than a blue one is a departure from that convention.
The case is black ceramic in the Code 11.59 construction, round from above and octagonal through the middle section, with hollowed lugs welded to the case band. Working that architecture in ceramic is harder than in metal, since nothing can be corrected after machining and the finishing has to be achieved in the tooling. The dial is smoked green enamelled aventurine. Aventurine glass carries copper particles suspended through it, and those particles catch light as discrete points rather than as a continuous sheen, so the surface reads as a field of small reflections rather than as a gloss. Firing enamel over that adds colour without covering the particles, and smoking the result darkens it towards the perimeter so the centre stays brighter and the edge recedes under the bezel. Rose gold hour markers and hands cross it, and warm metal against green is the pairing that keeps the dial from reading as cold. The strap is a mixed rubber construction with a rubber coating and textile decoration, lined in calfskin, with a rose gold folding clasp. The strap construction is the most complex in the case group, combining a rubber coating with a textile decoration over a calfskin lining, which produces a surface with visible texture rather than the uniform finish the other three references use. That elaboration is consistent with a dial built in stages rather than selected in one.
The function set is a flying tourbillon with hours and minutes. The cage is supported from below alone with no bridge crossing it, which is the harder construction and the one that leaves the assembly visible without obstruction. Winding is automatic. There is no date and no seconds hand, and on this dial the reason differs from the natural stone references. An aperture could technically be cut into a made material without severing a pattern that came from geology, but the smoking is graded across the surface and a window would interrupt the gradient at a fixed point, so the constraint remains even though its origin is different. The tourbillon aperture was designed into the dial from the start, so the smoking is graded around a known opening rather than across a full disc that is then cut, which is the only reason the gradient survives the presence of a hole in the middle of it.
Within the case group this reference sits between the two extremes. The onyx version is uniform black with no pattern at all, the meteorite version carries a pattern nothing could reproduce, and this one is a manufactured surface built up in three deliberate stages. That makes it the most controlled of the four and the only one where the maker decided how the dial would look rather than choosing between slices. Three of the four references are black ceramic and the sodalite version in white gold is the exception, so this reference shares its case material with two others and its dial approach with none. That makes it the reference in the group most likely to be overlooked by a collector shopping for natural materials and the one most likely to be chosen by someone shopping for a finished result. Neither approach is wrong and the group exists to accommodate both. What the four share is that the dial is the reason to buy any of them, and the mechanism underneath is identical across all four, so the decision is genuinely about material and nothing else.
The buyer here is generally responding to the colour and the depth rather than to the idea of a natural material, and there is no reason to treat that as the lesser motivation. A smoked enamelled aventurine dial produces an effect no stone can, since the particles sit within a transparent body and the enamel adds a colour that light passes through before reaching them. Natural stone reflects from its surface, while this dial returns light from inside itself. Collectors who have looked at the onyx and meteorite versions and found them too severe usually arrive here, and the green is the warmest thing the case group offers. Rose gold markers reinforce that, and between the dial and the hands this is the only one of the four that could be described as inviting rather than impressive. That distinction tends to decide the purchase once all four have been handled, since a buyer who wants a watch to live with rather than to present will find the other three demanding in ways this one is not. Green is also the least used colour across the collection, appearing on a handful of references where blue and black are common, so the reference is unusual within the wider range as well as within its own case group.
