Audemars Piguet 25657BA Quantieme Perpetual Calendar 18K Yellow Gold White Dial

The Audemars Piguet reference 25657BA.00.A002XX.01 is a refined expression of the brand's classical high-complication watchmaking from the mid-1980s, executed in 18K yellow gold with an understated white dial. Known as the Quantieme Perpetual Calendar, it belongs to the important lineage of ultra-thin perpetual calendars that helped define Audemars Piguet's modern reputation among serious collectors. Its compact 36 mm case and notably slim profile give it the elegant proportions expected of the era, while the layout preserves the clarity and balance that distinguish the best perpetual calendar wristwatches. The watch is powered by a manual-wind movement, a configuration that reinforces its traditional character and appeals to collectors who value direct interaction with a complicated caliber. As a perpetual calendar, it was engineered to account for irregular month lengths and leap years, placing it firmly in the category of serious traditional complications rather than simple calendar watches. The reference is especially compelling for enthusiasts focused on Audemars Piguet's pre-Royal Oak complicated dress watches, a field that remains historically important and comparatively underappreciated. In yellow gold with a white dial, this execution offers a distinctly formal presentation that reflects the restrained design language of Swiss haute horlogerie in the period. Surviving examples are sought after for their combination of thin case architecture, classical calendar display, and clear connection to one of the most respected names in perpetual calendar production. For collectors building around important complicated wristwatches of the 1980s, the 25657BA stands as a quietly significant and highly wearable Audemars Piguet. Like New with Audemars Piguet box and papers dated 1988. This piece was just fully serviced by Audemars Piguet in Q2/2026.