Audemars Piguet. Beau chronographe bracelet en acier avec date mouvement automatique Audemars Piguet. A fine stainless steel automatic calendar chronograph bracelet watch Royal Oak, Ref 25860ST.OO.1110ST.01, Produced 18th March 1999Audemars Piguet. Beau chronographe bracelet en acier avec date mouvement automatiqueAudemars Piguet. A fine stainless steel automatic calendar chronograph bracelet watch Model: Royal OakReference: 25860ST.OO.1110ST.01Date: Produced 18th March 1999Movement: 37-jewel Cal.2385 automatic, adjusted to heat, cold, isochronism and 5 positions, gold rotorDial: Tropicalised brown grid, applied luminous baton hour markers, white outer minute divisions with 5 minute markers, subsidiary dials at 3, 6 and 9 for seconds, 30 minute and 12 hour recording, date aperture between 4 and 5, white baton hands with luminous inserts, centre chronograph handCase: Brushed and polished tonneau form, back secured by 8 screws, 8 screws to bezel, screw down crown flanked by twin screw down pushers, No.E14244-470499Strap/Bracelet: Fitted brushed and polished steel linkBuckle/Clasp: Signed folding claspSigned: Case, dial & movementSize: 39mm Accompaniments: Audemars Piguet travel pouch, Extract from the Archives, Service receipt from Audemars Piguet dated 15/11/2022The Royal Oak was first introduced in 1972 and was designed by one of the most famous watch designers Gerald Genta. Over the years Audemars Piguet have released numerous modifications whilst maintaining the key elements conceived by Genta. This respect to Genta's design has created a long lasting legacy that speaks to collectors and enthusiasts alike.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.Back in 1997, this model was unveiled to mark the Royal Oak's 25th anniversary and has remained faithful to the original size of the first Royal Oak "Jumbo", ref. 5402 (39MM).Some of the first series dials have the ability to turn brown by developing a "Tropical" patina, like on the lot we offer.