Perpetual Moon

Reference: 1GLAS.U02A.C122S

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Case: stainless steel
Size: 42mm
Movement: hand-wound manufacture caliber A&S1512
Function: moon phase
Power Reserve: approximately 90 hours
Water Resistance: 30m
Dial: blue lacquer with guilloché base
Caseback: sapphire crystal
Strap/Bracelet: hand-stitched alligator leather
Factory Warranty: two years


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. The three-dimensional sculptured moon phase disc, which measures 29mm, was first hand-engraved and then duplicated for the series. The sophisticated Perpetual Moon is a superb example of Arnold & Son’s technical and artistic excellence.