3057. Audemars Piguet. A fine stainless steel automatic calendar chronograph bracelet watch Audemars Piguet. Beautiful stainless steel chronograph bracelet with date automatic movement Model: Royal Oak Reference: 25860ST.OO.1110ST.03 Date: Purchased in March 2006 Movement: 37-jewel Cal.2385 automatic, No.618506 Dial: Dark blue tapisserie grid, applied white baton hour markers with luminous inserts, white outer minute divisions, sunken engine-turned subsidiary dials at 3, 6 and 9 for running seconds, 30 minute and 12 hour recording, date aperture between 4 and 5, white baton hands with luminous inserts, centre chronograph hand Case: Brushed and polished octagonal form, 8 screws to bezel and back, screw down crown flanked by screw down chronograph pushers, No.F14912-8000 Strap/Bracelet: Fitted brushed stainless steel link Buckle/Clasp: Signed polished stainless steel folding clasp Signed: Case, dial & movement Size: 40mm Accompaniments: Audemars Piguet box, outer card, International guarantee dated 03/2006, Instructions manual, brochure The Audemars Piguet Royal Oak series is regarded by many as the quintessential sports watch. The iconic design revered by horological connoisseurs is instantly recognizable with its structured strongbox case with structurally integral octagonal bezel secured by eight hexagonal screws. Fitted with a Calibre 2385, the 25860ST became the first chronograph in the Royal Oak family and was introduced in 1998. The calibre 2385 was based on the Frédéric Piguet 1185 which was designed around 10 years earlier.