Audemars Piguet. A stainless steel automatic calendar bracelet watch Model: Royal Oak Reference: 15300ST.OO.1220ST.03 Date: Purchased 19th October 2010 Movement: 40-jewel Cal.3120 automatic, free-sprung glucydur balance, engraved gold rotor, No.775566 Dial: Black waffle pattern, applied luminous filled baton hour markers, outer minute divisions, date aperture at 3, polished baton hands with luminous inserts, centre seconds Case: Brushed and polished tonneau form, polished and brushed bezel with 8 screws, exhibition back, No.13404, H06258 Strap/Bracelet: Brushed and polished link Buckle/Clasp: Signed butterfly folding clasp with push buttons Signed: Case, dial & movement Size: 39mm Accompaniments: Audemars Piguet box, outer card, Extract, delivery box, swing tag Footnotes: The 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. For further information on this lot please visit Bonhams.com