Audemars Piguet Quantième Perpétuel Automatique Ref. 25557BA – 18k Yellow Gold (Early 1980s)
Elegant and highly collectible Audemars Piguet perpetual calendar, crafted in 18k yellow gold and featuring a refined octagonal case—subtly echoing the Royal Oak design while remaining distinctly dress-oriented.
The 35 mm case is paired with a beautiful integrated beads-of-rice bracelet, appearing uncut and fitting up to approximately 18.5 cm, a rare and desirable feature.
The original champagne dial is in very good condition, displaying a full perpetual calendar with day, date, month, leap year, and moonphase—balanced, legible, and perfectly matched to the warm gold tones.
Powered by the legendary ultra-thin Audemars Piguet Calibre 2120/2800 automatic movement, fully serviced and running excellently—one of the most celebrated perpetual calendar calibres ever made.
Fitted with a sapphire crystal and retaining its original unsigned gold crown.
Key highlights:
35 mm case in 18k yellow gold
Octagonal bezel design
Original champagne perpetual calendar dial
Day, date, month, leap year & moonphase
AP Cal. 2120/2800 automatic (serviced)
Integrated beads-of-rice bracelet (~18.5 cm, uncut)
Sapphire crystal
Original unsigned crown
Reference 25557BA, early 1980s
A rare and sophisticated Audemars Piguet, combining ultra-thin complication with elegant design—an exceptional piece from the golden era of mechanical watchmaking revival.
