How to check Royal Oak serial number?
Each watch case also bears a unique engraved number, generally visible on the back of the watch. Assigned consecutively since 1951 (n° 1), the big case numbers reached about 60,000 in 1970. After the 100,000 mark in 1975, the series started again at B1 until B99999 (around 1986) then C1 to C99999, etc. The serial number of your watch is engraved on the back of the case.
How to check AP Royal Oak serial number?
AP typically engraves the unique serial number—also called the case number—right on the exterior metal. On a newer Royal Oak or Royal Oak Offshore, you’ll find it etched around the rim, making it easy to spot. This is your watch’s unique fingerprint, totally separate from the model reference number. Most modern AP watches feature the serial engraved on the caseback, either around the perimeter or on the solid back itself. Earlier vintage pieces may have the case number engraved inside the case, requiring opening the watch to view it.The movement number is engraved on the mainplate of the movement, which can only be seen if the watch has a transparent caseback or if the back of the watch is removed. Conversely, the AP case number — also known as the Audemars Piguet serial number — is engraved on the outside of the caseback.Audemars Piguet is considered one of the most prestigious watchmakers in the world and as mentioned earlier, is one of the holy trinity of watchmaking. However, Patek Philippe is held to a slightly higher standard than AP.Audemars Piguet manufactures approximately 40,000 watches annually. Each watch features a unique sequence of numbers on its caseback. Since 1975, these numbers have been preceded by a letter that changes after every 100,000 watches.