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Audemars Piguet Royal Oak Selfwinding 15400ST

Produced 2012 to 2019. Discontinued.

Specifications

Case size
41mm, 9.8mm thick
Case material
Stainless steel
Bezel
Fixed, octagonal
Dial
Grande Tapisserie pattern across the whole dial, with the date window set near the middle and a small applied index beside it
Movement
Audemars Piguet calibre 3120, automatic, 26.6mm in diameter
Power reserve
About 60 hours
Bracelet
Integrated stainless steel bracelet

The story

Audemars Piguet's Royal Oak Selfwinding line is the more robust, mainstream cousin of the ultra-thin Jumbo. Its first reference, the 15300, was a 39mm automatic powered by the in-house calibre 3120, and Fratello says it was made from 2005 until 2011.

In 2012 the 15400 replaced it. Audemars Piguet enlarged the case to 41mm and kept the calibre 3120 inside. Monochrome Watches says the update brought a new dial made in-house on turning machines, new fonts and a logo placed below the marker at 12 o'clock. At SIHH 2015 the brand added a two-tone steel and gold version, the 15400SR.

The 15400 was produced until early 2019. It was replaced by the 15500ST, shown at SIHH 2019, which has a new calibre 4302 movement, a date window moved to the edge of the dial and a case 10.4mm thick against 9.8mm for the 15400.

What to check before you buy

The dial is the quickest way to separate the 15400 from the 15500ST that replaced it. On the 15400 the Grande Tapisserie pattern covers the whole dial, including the minute track, the word Automatic sits at 6 o'clock, and the date window sits well in toward the middle with a small applied hour marker next to it. The 15500 has a smooth minute track around the edge and moves the date to the periphery.

The case is 41mm and 9.8mm thick, and through the caseback you see the calibre 3120, which is 26.6mm across. Monochrome Watches notes some collectors found it small for a 41mm case, while calling it a reliable, precise engine. The 15400 reference also covers a two-tone steel and gold version, the 15400SR, so check the suffix on the paperwork.

Buying or selling a 15400ST?

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Common questions

When was the Royal Oak 15400ST made?

Audemars Piguet introduced the 41mm reference 15400 in 2012 as an update of the 39mm 15300, and Monochrome Watches says it was produced until early 2019.

What movement does the 15400ST have?

The in-house calibre 3120, an automatic that is 26.6mm in diameter and has a 60-hour power reserve. It beats at 3Hz, or 21,600 vibrations an hour.

What replaced the 15400ST?

The 15500ST, introduced at SIHH 2019. It has the new calibre 4302 with a 70-hour power reserve, a 4Hz beat and a date window moved to the edge of the dial.

How thick is the 15400ST?

9.8mm, according to Monochrome Watches. The 15500ST that replaced it is 10.4mm thick.

Was there a two-tone Royal Oak 15400?

Yes. Audemars Piguet unveiled a two-tone steel and gold version, the 15400SR, at SIHH 2015.

Related references

Sources

The facts on this page come from the brand and from established watch publications.

Specifications summarized from the manufacturer's published information and the watch press. Moda is an independent community and is not affiliated with, endorsed by, or sponsored by Audemars Piguet. Trademarks belong to their owners. Spot an error? Tell us through the contact form and we will fix it.