Conceived in secrecy amidst the turmoil of the quartz crisis, the Quantième Perpétuel stands as Audemars Piguet's quintessential complicated dress watch. Powered by the era's thinnest automatic perpetual calendar movement, it represents one of the 1970s' most significant horological innovations. In the realm of timepieces, true classics arise when function seamlessly intertwines with style. The 25657BA exemplifies this ethos flawlessly, striking a harmonious balance while imparting a wealth of information. Its design remains sleek and elegant, yet highly functional. Today, this model remains a top choice for anyone seeking a timeless and classic yet complicated dress watch. 

This example was difficult to pass up on as it features an absolutely flawless dial, devoid of any blemishes. The case also remains strong with even lugs and deep markings. We're thrilled to offer this neo-vintage classic in excellent running condition and ready for its next chapter of enjoyment. 

Dial: Is mint with no blemishes under magnification. No cracks whatsoever. Hands: Are matching. Case: Remains thick and even. Light and honest signs of use consistent with age. The hallmarks and engravings remain deep and clearly visible. Correct unsigned crown. Bracelet: 18k Audemars Piguet buckle and two piece grained leather strap in beige. Crystal: Clear. All functions of the watch operate flawlessly. The movement is running well on our timegrapher and comes with our 1-year mechanical warranty.

Year/era: 1990s Reference: 25657BA Serial: CXX Dimensions: 36mm wide, 37.5mm lug to lug, 20mm lug width. Movement: Automatic AP caliber 2120/1, based on JLC 920, with 21kt gold rotor.