Audemars Piguet Quantième Perpétuel Automatique Octagonal in 18k Yellow gold Ref. 25557BA From 1980s

Audemars Piguet Quantième Perpétuel Automatique Octagonal in 18k Yellow gold Ref. 25557BA From 1980sAudemars Piguet Quantime Perptuel 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 casesubtly 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

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.