AP 15400 Royal Oak Watches

The Audemars Piguet Royal Oak 15400 is the modern classic that took the Royal Oak to 41 mm, pairing the signature octagonal bezel and integrated bracelet with the in-house calibre 3120.

Why collectors love the 15400

• Pure Royal Oak DNA: Octagonal bezel with white-gold screws, crisp bevels, and the integrated bracelet that made the icon.
• Balanced proportions: A 41 mm case that still wears slim; everyday-friendly with a dress-sport profile.
• Calibre 3120: In-house automatic (≈60 h reserve, 21,600 vph) with solid reliability and a beautifully finished rotor.
• Tapisserie depth: The “Grande Tapisserie” dial delivers real texture—especially in blue and black.
• Liquidity: Steel 15400ST—especially blue boutique pieces—remains highly sought after; rose gold (15400OR) and two-tone (15400SR) add precious-metal presence.

Fit & wrist notes

• The 15400 wears flatter than specs thanks to its thin mid-case and tapering bracelet.
• Blue dials read slightly smaller on wrist; silver/white can wear larger in bright light.
• The bracelet should drape with minimal gap—extra links included in a full set add value and sizing flexibility.