Audemars Piguet Triple Calendar Moonphase

Complicated vintage dress pieces — particularly ones finished in precious metals and packing a lot of horological heat for their size — are often overlooked these days.  But those in the know will recognize that the craftsmanship, materials, and complexity amount to worlds beyond their current market value, and will snatch them up in advance of an inevitable stylistic turn in their direction! Furthermore, pieces such as this — a yellow gold automatic calendar with moon phase — are a perfect example of Audemars Piguet's design savoir-faire beyond the cherished Royal Oak collection.  A Reference 25589BA dating to the 1980s, it’s housed in a 33mm yellow gold case with a mineral crystal, an 18k yellow gold crown, and a stepped bezel characteristic of its era. It features a clean, white enamel dial with painted black 'Roman' indices, a matching yellow gold ‘pencil’ handset, a date indicator at 3:00, a day indicator at 9:00, and a whimsical moonphase aperture at 6:00. The high-grade Calibre