How to Check Audemars Piguet Royal Oak Serial Number?

Audemars Piguet is known for its use of high-quality materials such as gold and platinum, and some fancy stones, on their watches. Considered as one of the top Swiss Watch brands, AP watches are often worn by celebrities. This fact shows the quality of Audemars Piguet watches as well as their relatively high price! One of the most famous AP watches is the Royal Oak series.

One of the things to keep in mind when buying an expensive watch, is to know if it is real and authentic. Below, is a guide about Audemars Piguet Royal Oak serial number check and where to find it, as well as ways of aestheticizing AP watches. Make sure to accompany at Saatsaz Watch and learn more about the REAL Royal Oaks and be able to spot the fake AP watches.

AP Royal Oak Serial Numbers

Serial numbers are a big part of high-end watches as they allow you to know more about them. But the AP watch brand has taken this to more seriously as Audemars Piguet Royal Oak Serial Numbers vary more than you can imagine. Based on the year of production, series, body and strap materials, used gems and more factors, AP has introduced and engraved different serial numbers on the back of their watches.

Before jumping into AP Royal Oak serial numbers, there are some letters that you should know about. Some of these letters are indicators of series and some indicate the used material.

Material Letters in AP Royal Oak serial numbers

Audemars Piguet had a different set of letters for used material in their Royal Oaks.

Case Material Letters Bezel Type Letters Strap Material Letters
BA: Yellow Gold OO: Smooth Bezel CA: Rubber Strap
BC: White Gold ZZ: Diamond-Set Bezel CR: Leather Strap
CB: White Ceramic YG/YY: Colored Gemstone-Set Bezel KB: Rubber-Coated Strap
CE: Black Ceramic GG: Frosted (Hammered) Gold Bezel VE: Calfskin Strap
IO: Titanium and Ceramic
OR: Rose Gold
PT: Platinum
RO: Rose Gold and Ceramic
SA: Steel and Yellow Gold
SO: Steel and Ceramic
SR: Steel and Rose Gold
ST: Stainless Steel
TI: Titanium

Now that we know about these letters, it is time to talk about the release of Royal Oak 5402ST series in 1972 and the serial numbers that were engraved by them in each year. (Also, now you know that the ST, stands for “Stainless Steel”.)

Launch of Royal Oak series by Audemars Piguet

In 1972, AP watch brand was set to produce only 1000 units of Royal Oak watches and dedicated the letter “A” to the series and starting from A1 to A1000. But this series had an unexpected success and high demands after a year, so they decided to continue the production of Royal Oaks but dedicate other letters such as B, C and D to them.

Chart of AP Royal Oak serial numbers and production years

AP Royal Oak Serial Number  Production Years
5402ST A1 – A1000 1972 – 1974
A1000 – A2000 1974 – 1976
B1000 – B2000 1975 – 1979
C1000 – C2000 1976 – 1980
D1000 – D1500 1979 – 1985
5402BA 1 – 500 1977 – 1980
500 -1000 1980 – 1986
5402SA 1 – 1000 1977 – 1983
5402BC 1 – 150 1977 – 1981

Audemars Piguet Royal Oak Authentication

One of the signs of a real Audemars Piguet Royal Oak watch its serial number. By checking the serial number of your AP watch and matching the data of your watch with the data that we have provided you, you can authenticate your Royal Oak.

Also, real AP watches come with Audemars Piguet Warranty which we have covered in the linked article.


Audemars Piguet is one of the most high-end Swiss watch brands in the world that have released Royal Oak series in 1972. Expensive in price, AP watches are worn by famous individuals. But, when buying an expensive watch, one is worried about its authentication.

In this article, we have provided you useful information about Audemars Piguet Rpyal Oak serial numbers and their placement, production year, and ways of authentication. We at Saatsaz Watch thank you for accompanying us. If you have any questions or more information about AP Royal Oaks, make sure to ask and share with us in the comments.


Where is Audemars Piguet Royal Oak Serial Number?

  • The serial number of Audemars Piguet Royal Oak watches are generally engraved on the bottom part case back and are hard to miss. These serial numbers can authenticate your AP watch and tell you about its production year, materials, and much more.

How to Authenticate Audemars Piguet Royal Oak watches?

  • One of the ways of Royal Oak watches authentication is by their serial numbers. Also, the Audemars Piguet warranty can be a sign of a real Royal Oak watch. Find out more on this article.
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Arshia Farahani

Arshia Farahani, a versatile professional at Saatsaz Watch, serves as a Content Writer/Editor, curating and enhancing the platform's content. Arshia's objective is to provide valuable and customized information, addressing the specific needs and queries of the audience. Engage with Arshia by leaving comments or contacting via email at arshia[@] What is Arshia Farahani's Experience? Arshia Farahani, an accomplished Chemical Engineering student at IUT, and he works as a Content Writer and SEO Specialist at Saatsaz Watch. With prior ghostwriting experience for a Paraguayan company from 2021-2022, Arshia joined Saatsaz Watch in 2022, bringing a wealth of knowledge and skills. His responsibilities include content strategy planning and extensive research on watch brands. Arshia's dedication to staying updated with the latest trends in the watch industry enables compelling and informative content creation. Through meticulous research and a genuine passion for timepieces, Arshia deeply understands various watch brands, their histories, unique features, and market positioning. This expertise ensures accurate and engaging content that resonates with readers, fostering trust and reliability. Arshia Farahani's contributions allow Saatsaz Watch to provide a unique platform that educates, informs, and captivates watch enthusiasts worldwide.

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