Audemars Piguet Royal Oak Day-Date Moonphase ref 25594ST Mk1 Dial blue - Serial Y23xxxx dating to

- Serial Y23xxxx dating to 2002

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This is an early example that has the same lume material as the gilt dial watches

The lume dots and lume in the hands are a match and have taken on a rich cream patina

Audemars Piguet Royal Oak Day-Date Moonphase ref 25594ST Mk1 Dial blue - Serial Y23xxxx dating toThis beauty combines the legendary design of the original Royal Oak with classic 36 mm case sizebut with a twist: it is also a bona fide complicated watch from one of the great Grandes Maisons of horology , introduced in 1984. The reference 25594ST features day and date displays in large sub registers at the 3 and 9 oclock positions, along with a moonphase indicator at 6 oclock. And then theres the charm: the layout of the sub dials and moonphase