The Audemars Piguet Royal Oak watch (ref. 15400ST.OO.1220ST.01) features the AP Caliber 3120 mechanical automatic movement with an approximate 60-hour power reserve; black dial with an engraved "Grande Tapisserie" design and applied white gold hour markers; date aperture at 3 o'clock; center seconds hand; sapphire-crystal, transparent case back; and 41mm (9.8mm thickness), brushed stainless steel case on a brushed stainless steel bracelet with a push-button deployant clasp.

Launched in 2012 to commemorate the 40th anniversary of the original Royal Oak, the ref. 15400 is just slightly larger at 41mm than the 39mm Royal Oaks of the past. Its retains all of the aesthetic details that made this watch one of the most popular luxury sport watches of all time.

Brand: Audemars Piguet
Series: Royal Oak Automatic 41mm
Model: 15400st.oo.1220st.01
Size: Mens
Case Diameter: 41mm
Case Thickness: 9.80mm
Movement: Automatic
Case Material: Stainless Steel
Dial Color: Black
Bracelet/Strap: Stainless Steel Brushed & Polished
Clasp Type: Push Button Folding Clasp
Bezel: Fixed
Crystal: Scratch Resistant Sapphire
Case Back: Transparent
Screw Down Crown: Yes
Water Resistant 50m/150ft

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