Audemars Piguet Royal Oak Offshore Blue SS/Strap

More about Royal Oak Offshore Blue SS/Strap

This is a stainless steel Audemars Piguet Royal Oak Offshore Chronograph 25770ST.OO.A001KE.01. It has an alligator leather strap with a stainless steel double foldover deployment buckle, and a scratch resistant sapphire crystal. There is a solid case back secured with 8 screws, and engraved "AP – ROYAL OFFSHORE – AUTOMATIC," and two serial/model numbers. It has a 45mm diameter solid three-body case, downturned lugs, and brushed bezel with 8 hexagonal screws, are polished/brushed. There are round rubberized chronograph pushbuttons, and a hexagonal rubber clad screw-down winding crown with a crown guard. The octagonal dial is blue with a "clous-de-Paris" guilloche pattern, a center sweep chronograph hand, and luminous Arabic numerals and baton hands. The bezel has 8 hexagonal recessed polished stainless steel nuts that are screwed through to 8 screws on the case back. There is a minute/one-fifth seconds track, and an outer tachometer graduation to 500 UPH. It has a circular date aperture window at 3 o'clock underneath a Cyclops magnification bubble, and there are 3 subsidiary satiné silver dials, one for the constant seconds at the 12 o'clock position, another 12-hour register at 6 o'clock, and a 30-minute register is at 9 o'clock. It's water resistant to 100 meters/330 feet, and the 14mm thick case, dial, and movement are all signed. This Audemars Piguet Royal Oak Offshore Chronograph 25770ST.OO.A001KE.01 has a mechanical automatic self-winding Audemars Piguet caliber 2226/2840 movement that's rhodium-plated, with fausses cotes embellishment. It's constructed with 54 jewels, a shock absorber device, and a straight-line lever escapement. It includes a monometallic balance that's adjusted to heat, cold, isochronism and 5 positions, a self-compensating flat balance spring, and a 21K gold rotor. This Audemars Piguet Royal Oak Offshore Chronograph 25770ST.OO.A001KE.01 is one of the earliest Royal Oak Offshore references.

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