SJX Watches
Up Close: Arnold & Son Luna Magna
Announced at Watches & Wonders 2021, the Arnold & Son Luna Magna boasts an exceptionally large spherical moon phase display that sits serenely on a dial made of aventurine glass. Powered by an in-house movement like all Arnold & Son (A&S;) watches, the Luna Magna typifies the sort of smartly-executed simple complications that A&S; excels at. The hand-wind movement is sharply finished, while the moon phase sphere is an unusual combination of two halves in aventurine glass and white marble. Initial thoughts The Luna Magna has simple but striking aesthetics. The dial is symmetrical and made up of classical details like Romain numerals and blued hands. But it has a very, very large moon phase display that’s also spherical. So it doesn’t try to do very much – the dial shows hours, minutes, and age of the moon – but it does the moon phase well. A&S; describes it as the “largest moon ever built into a wristwatch”, which I do not dispute in principle, and it certainly looks the part. But strictly speaking, “ever” is inaccurate, for the spherical moon in the Konstantin Chaykin Lunokhod is the same 12 mm in diameter. While A&S; did have extra-large moon phase display in a past model, it was a flat moon phase, lacking the three-dimensionality of the Luna Magna. That size of the moon sphere means it requires substantial clearance under the crystal, which leaves the total case height, including the crystal, a tall 15.9 mm. The moon seen from the back The movement inside is...
