Audemars Piguet – An Essential Guide to Understanding References

To offer effective advice on an Audemars Piguet watch, whether buying, selling, or checking it for a technical reason, it's essential to have a thorough understanding of the structure of the identification codes used by the brand. Every detail, from the serial number to the complete reference, tells the story of the piece and reveals its configuration, era, and authenticity.
Knowing how to correctly read serial numbers and references allows you to avoid errors, recognize altered or reassembled watches, and properly enhance each model.
In this guide, we'll see how to decipher Audemars Piguet references and interpret case serial numbers, essential tools for anyone who wants to offer professional and reliable advice in the world of fine watchmaking.

Importance of Cataloging

Audemars Piguet has adopted different cataloging systems over time to identify its creations, with serial numbers that vary based on the era and technical specifications (case, caliber, etc.).

More Traceable Serials

Thanks to limited production, AP serial numbers are easier to interpret than those of mass-produced brands, allowing for better dating of the models.

Where to Find Case Serials

They are engraved on the caseback, even on models with a see-through caseback. Until 1972: case serial number = movement serial number After 1972: the two serial numbers are distinct (numeric or alphanumeric)

2017 Change: Randomized Serials

Since 2017, serial numbers are random alphanumeric, making it impossible to establish production history based on the number alone.

Progressive Letters (pre-2017)

Many serial numbers began with letters (e.g., D, E, F, etc.), indicating the production period.

Audemars Piguet Online Services

Today, you can register your watch online, verify ownership, and extend the warranty through the official AP platform.

How to Read Audemars Piguet References

AP references are made up of 17 characters (11 numbers + 6 letters) that identify every detail of the watch.

Reference Structure

Example: 25654ST.OO.0944ST.01

• 25654 = Watch model
• ST = Case material (e.g., ST = steel, OR = rose gold)
• OO = Bezel type
• 0944 ST = Bracelet/strap code and material
• 01 = Dial code (color/type)

Why it's useful

Understanding the reference means knowing the exact configuration, materials, and aesthetic details of the watch.

Audemars Piguet Serial Numbers and Production Year Table

Audemars Piguet Serial Numbers and Production Year Correspondence

Audemars Piguet Material Codes Correspondence

Material Code Rings

Strap Material Abbreviation