Audemars Piguet launched a new diver’s watch at SIHH last week. The Royal Oak Offshore Diver measures 42mm x 13.75mm and is powered by AP’s manufacture 3120 automatic movement. The ROO Diver meets or surpasses each of the Swiss watch industry norms (NIHS) for dive watches, including time preselection device, visibility, water resistance, anti-magnetic properties, resistance to shock and thermal variations, and resistance to external forces.
The time preselection device norm (NIHS 92-11 corresponding to ISO 6425) calls for a device that is protected against any unintentional rotation. The ROO Diver has a unidirectional inner bezel that is activated via a click mechanism linked to the crown at 10 o’clock. The wearer must unscrew the crown to turn the bezel.
The Swiss dive watch norms require that the time measured on the inner dial ring must be readable in the dark from a distance of 25 cm, or about 10 inches. The ROO Diver meets this requirement with faceted, luminescent baton hour markers along with faceted and luminescent hour and minute hands. The inner bezel has a minutes scale that highlights 5 minute intervals.
The Swiss norms require that all dive watches must be water tight to 100 meters. The ROO Diver exceeds this standard with 300 meter watertightness. The ROO Diver also meets the standards for antimagmetic, shock and thermal variation resistance, and the size of the buckle has been increased so that the strap can withstand forces up to 200 Newtons.
The ROO Diver is equipped with the Manufacture Audemars Piguet automatic winding caliber 3120 movement. The movement uses a variable-inertia balance with a flat balance-spring oscillating at 21,600 vibrations per hour. Adjustment is performed by means of eight inertia-blocks. The cross-through balance bridge is attached on both sides of the mainplate and so provides enhanced shock-resistance. The direct-drive central seconds hand avoids backlash.
Caliber 3120 features a 60 hour power reserve, fast-adjustment date display, and stop or hacking seconds. The movement is hand-assembled in Le Brassus. The bridges are chamfered and polished. The jewel sinks are diamond-polished. The wheels feature chamfered spokes and diamond-polished jewel sinks. Screw rims and slots are chamfered. The hand-crafted decoration includes a mainplate circular-grained on both sides and bridges with Côtes de Genève. The monobloc 22-carat gold oscillating weight bears the Audemars and Piguet family crests and the AP monogram.
Technical specifications appear below the images, which can be enlarged with a click.
Royal Oak Offshore Diver
Stainless steel case
Water-resistant to 300 meters
Proprietary Caliber 3120, selfwinding
Total diameter : 26.60 mm
Casing diameter: 11.5 lignes (26 mm)
Thickness: 4.25 mm
22-carat gold oscillating weight
Up to 60-hour power reserve
Cadence of the balance: 21,600 vibrations per hour
Variable-inertia balance with eight inertia-blocks and flat balance-spring
Geneva-type mobile balance-spring stud holder
Three-position winding stem
Finishing: all parts finely decorated; mainplate circular-grained; bridges rhodium-plated, chamfered, snailed and adorned with Côtes de Genève. Diamond-polished jewel sinks; wheels with chamfered spokes and diamond-polished jewel sinks; chamfered screw rims and slots
Oscillating weight engraved with the AP monogram and the Audemars and Piguet family crests
Black rubber crowns
Diameter: 42 mm
Thickness: 13.75 mm
Back with medallion bearing the legend Royal Oak Offshore
Water-resistant to 300 meters
Black with exclusive “Méga Tapisserie” motif
Inner rotating ring with diving scale
Applied gray hour-markers with luminescent coating
Faceted white gold hour and minute hands with luminescent coating
Black rubber with oversize stainless steel pin buckle
Hours and minutes