Audemars Piguet Quantième Perpétuel Automatique Ref. 25657BA – 18K Yellow Gold, Extract from the Archives

A refined neo-vintage Audemars Piguet Quantième Perpétuel Automatique reference 25657BA in 18k yellow gold, featuring a silvered dial, recessed calendar registers, moon phases, and the ultra-thin automatic calibre 2120/2800. Fitted with its original 18k gold Audemars Piguet buckle and accompanied by an Extract from the Archives.

Offered here is an exceptionally elegant Audemars Piguet Quantième Perpétuel Automatique reference 25657BA, a watch that embodies an important chapter in the preservation of traditional mechanical watchmaking. Emerging during the quartz era, Audemars Piguet’s ultra-thin automatic perpetual calendars demonstrated the enduring appeal of sophisticated mechanical complications, expressed through restrained proportions and classical design.

The defining feature of the present watch is its beautifully balanced silvered dial, framed by a polished 18k yellow gold stepped bezel. Slender applied gold baton hour markers and matching central hands provide a warm contrast against the light background, while dark subsidiary hands distinguish the calendar indications. The recessed registers give the dial depth and character without compromising its understated elegance.

The month is displayed at 12 o’clock, the date at 3 o’clock, and the day of the week at 9 o’clock, complemented by a moon-phase display at 6 o’clock. This symmetrical arrangement presents the perpetual calendar with remarkable clarity. Discreet correctors positioned around the case allow adjustment of the calendar and moon-phase indications while preserving the clean case profile.

Powering the watch is the automatic calibre 2120/2800, an ultra-thin perpetual calendar movement central to Audemars Piguet’s complicated watchmaking of the period. Housed in a 36 mm case measuring approximately 7.5 mm thick, it delivers considerable mechanical sophistication within the proportions of a traditional dress watch.

The present example bears case number C 15760 and is fitted with a beige suede-style leather strap, secured by its original 18k gold Audemars Piguet buckle. The softly textured strap brings a relaxed contemporary contrast to the yellow gold case, while the original signed buckle provides a desirable finishing detail. The watch is accompanied by an Audemars Piguet Extract from the Archives; its specific production and sale dates should be transcribed directly from that document.

With its balanced dial, precious-metal construction, and ultra-thin automatic movement, this reference 25657BA is a compelling choice for collectors seeking a discreet and historically significant perpetual calendar. The accompanying Extract from the Archives adds documentary interest to an already appealing example of neo-vintage Audemars Piguet.

Included:

Original 18k gold Audemars Piguet buckle

Audemars Piguet Extract from the Archives

No box or original guarantee papers

Specifications

Brand: Audemars Piguet
Model: Quantième Perpétuel Automatique
Reference: 25657BA
Period: Circa 1980s; exact year to be confirmed from the Extract from the Archives
Reference production period: 1982–1993
Case number: C 15760
Case material: 18k yellow gold
Case shape: Round with stepped bezel
Case size: 36 mm
Thickness: Approximately 7.5 mm
Dial: Silvered with recessed calendar registers
Markers: Applied gold baton hour markers
Hands: Gold-tone central hour and minute hands with contrasting dark calendar hands
Movement: Automatic calibre 2120/2800
Functions: Hours, minutes, perpetual calendar with day, date and month, and moon phases
Calendar layout: Month at 12 o’clock, date at 3 o’clock, day at 9 o’clock, and moon phases at 6 o’clock
Case back: Solid, engraved “Quantième Perpétuel Automatique”
Strap: Associated beige suede-style leather
Buckle: Original 18k gold Audemars Piguet buckle
Accessories: Audemars Piguet Extract from the Archives
Set: Watch with Extract from the Archives; no box or original guarantee papers

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