The Perpetual Moon’s lugs have been simplified so that instead of their original cross shape, they now present a tauter form of plunging bars with beveled ends. The case, previously measuring 42mm, is reduced to 41.5mm without affecting the size of the dial. This has reduced the width of the bezel, drawing attention to the dial, its finishes, and its vast moon.

The Perpetual Moon is alluring and precise, with one of the biggest moon phase apertures on the market. The moon phase will deviate by only one day every 122 years, at which point a single push on the corrector will keep it in sync for another 122 years.

Realistically depicted with hand-painted shadows, the large moon is enhanced with a luminescent material that is particularly intense in darkness yet invisible in the daylight, giving way to the white mother-of-pearl disc. It is set against a salmon PVD-treated grained sky and is surrounded by the constellations of the Big Dipper and Cassiopeia, also hand-painted and coated with Super-LumiNova.