Audemars Piguet Quantième Perpétual Calendar 25657BA

The Audemars Piguet Quantième Perpétuel Ref. 25657BA is a perfect example of high-end watchmaking from a time when complications were still made in smaller numbers, by hand, for collectors who truly understood what they were buying. Produced mainly during the 1980s and early 1990s, this reference stands out not only for its mechanical complexity but for its slim, classic proportions and unmistakably elegant presence.

The case, in this example made of 18k yellow gold, measures just 36mm across and sits flat on the wrist thanks to the ultra-thin movement inside. The design is simple and refined. A polished bezel, brushed case surfaces, and short lugs give it a quiet, timeless shape.

The dial layout is pure function and balance. It shows the full perpetual calendar: day, date, month, moonphase, and leap year indication, all neatly arranged without feeling crowded. The typography is classic AP, understated but legible.

Inside is the AP Caliber 2120/2800, one of the thinnest full perpetual calendar movements ever made, based on the legendary Jaeger-LeCoultre 920 ébauche, which was never sold to anyone outside of the Holy Trinity.

Warranty Information:

We take pride in the quality and durability of our watches. As a testament to our commitment, each timepiece in our collection comes with a 2-Year Warranty on the Mechanical Movement. This warranty reflects our confidence in the reliability of our watches and offers you peace of mind as you embrace the heritage and style of a bygone era.

If you have any questions, please don’t hesitate to send us a message – we’re here to assist you on your vintage watch journey!