Audemars Piguet Caliber 4302

Manufacturer	Audemars Piguet
Caliber Number	4302
Movement Type	Automatic, self-winding mechanical
Diameter	32mm
Height	4.9mm
Jewel Count	32
Total Components	257
Beat Rate / Frequency	28,800 bph / 4 Hz
Lift Angle	Unconfirmed
Power Reserve	70 hours (~3 days)
Rotor Type	Ball bearing system with 3 screws
Rotor Winding Direction	Bi-directional
Hand-Windable?	Yes
Anti-Shock Device	Incabloc
Hand Count	3
Functions	Central hours; central minutes; central seconds; date at 3:00
Hacking Seconds?	Yes
Gold Parts?	Yes – 22K gold rotor
Country of Manufacture	Switzerland, Swiss made
Known Models	Audemars Piguet Royal Oak Selfwinding (Ref: 15500ST.OO.1220ST.01, 15500ST.OO.1220ST.02, 15500ST.OO.1220ST.03, 15500ST.OO.1220ST.04, 15500OR.OO.D002CR.01, 15500OR.OO.1220OR.01, 15502OR.ZZ.1222OR.01), Audemars Piguet Code 11.59 (Ref: 15210BC.OO.A002KB.01, 15210ST.OO.A056KB.01, 15210QT.OO.A064KB.01, 15210OR.OO.A348KB.01, 15210OR.OO.A056KB.01, 15210ST.OO.A009KB.01, 15210ST.OO.A348KB.01, 15210OR.OO.A099CR.01, 15210OR.OO.A002CR.01, 15210BC.OO.A321CR.01, 15210BC.OO.A002CR.01, 15210CR.OO.A009CR.01, 15210OR.OO.A616CR.01, 15210BC.OO.A500KB.01, 15210CR.OO.A002KB.01, 15210OR.OO.A002KB.03) (Add your watch to the comments below…)

The Audemars Piguet caliber 4302 is a 3-hander automatic movement with a date. This calibre was originally introduced in 2009, and is regarded as an update to the AP 3120 from circa 2003.

The 4302 is still found in watches that were announced as recently as 2/25/25 – such as the new 41mm Code 11.59 (Ref: 15210ST).

AP described the 4302 as:

“The simple hour, minute, centre second and date movement launched in 2019.” –Source

Rotor Designs:

You may find examples of the 4302 with different rotor designs depending on the models. Unfortunately, despite their prices, Audemars Piguet rarely shows caseback or movement image on their official website.

AP 4302 VS 4309:

There is a similar caliber 4309 with the main difference being that the 4302 being discussed here has a date calendar complication, whereas the 4309 is a true no-date.

Something worth noting is that these calibers are so similar that Audemars Piguet’s official site shows an image of the 4302 next to specs for the 4309 (source):

The lack of a calendar system on the 4309 results in a reduced number of total components, bringing the count to 225 VS 257 in the 4302.

If AP touts the simplicity as a defining characteristic of the 4302, the 4309 takes it even further.

Additional Macro Images:

Quick FAQs:

When manually-winding the movement, how many turns of the crown does it take to get to full power reserve?
About 40 full turns of the crown.

Can you over-wind it?
No.

Additional Resources:

• Audemars Piguet interactive user guide