This is a stainless steel Audemars Piguet Royal Oak Offshore Triple Date 25807ST.OO.1010ST.01. It has an integral stainless steel link bracelet with a concealed double deployment clasp, and a scratch resistant sapphire crystal. It has a screw-down rubber-clad winding crown protected by case shoulders with two correctors for the date, and a rubber gasket ring between the bezel and the case. There is a solid octagonal case back secured with 8 steel screws and engraved with "AP – ROYAL OAK OFFSHORE - AUTOMATIC," serial and edition numbers. The 39mm diameter solid three-body case, integral hooded lugs, and flat octagonal bezel with eight hexagonal screws are brushed. It has a cosmos blue clous de Paris waffle texture dial, with luminous steel baton hands, and a luminous white arrow-tipped hand that indicates the date on the angled outer perimeter of the dial. It has applied oval hour markers with luminous inserts around an outer minute scale. There are twin rectangular aperture windows underneath the 12 o'clock position with the day and month respectively, and a running seconds subsidiary dial is at 6 o'clock. It's water resistant to 50 meters/165 feet, and there is a 38-hour power reserve at full wind. The 12mm thick case, dial, and movement are all signed. This Audemars Piguet Royal Oak Offshore Triple Date 25807ST.OO.1010ST.01 has a mechanical automatic self-winding Audemars Piguet caliber 2127/2827 movement. It's rhodium-plated, with fausses cotes embellishment, and it's constructed with 36 jewels, a shock absorber device, and a straight-line lever escapement. It includes a monometallic balance that's adjusted for heat, cold, isochronism, and 5 positions, a self-compensating flat balance-spring, a rotor with a 21K gold segment, and a hacking seconds mechanism for precision time setting. The movement oscillates at a frequency of 28,800 vph (4Hz). The Audemars Piguet Royal Oak Offshore Triple Date 25807ST.OO.1010ST.01 was introduced in 1996, and it was produced until 2000.