The Audemars Piguet 25657BA represents the pinnacle of classic watchmaking elegance in an ultra-slim form. Introduced in the early 1980s, this automatic timepiece was groundbreaking—it housed the world’s thinnest automatic perpetual calendar movement at the time. Its 36 mm yellow gold case, just over 7 mm thick, features a balanced white dial with day, date, month indicators and moonphase, all smoothly integrated. A discreet masterpiece, built to last, epitomizing Audemars Piguet’s technical and aesthetic excellence of that era.
Audemars Piguet
Audemars Piguet Quantieme Perpetual Calendar Moonphase 25657BA
Case:
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Diameter: 36 mm
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Thickness: Approximately 7.5 mm
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Material: 18k yellow gold
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Crystal: Anti-reflective sapphire
Movement:
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Type: Ultra-thin automatic
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Caliber: 2120/2800 (based on the legendary JLC 920)
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Functions: Hours, minutes, day, date, month, moonphase
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Power Reserve: Approximately 40 hours
Dial & Hands:
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Dial: White guilloché with recessed sub-dials for calendar functions
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Hands & Markers: Applied gold hands and markers, ensuring elegant legibility
Strap & Clasp:
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Strap: Alligator leather (black or brown, depending on the example)
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Clasp: Yellow gold tang buckle
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