41. Audemars Piguet. A mid-size stainless steel quartz calendar bracelet watch Model: Royal Oak Reference: 56271ST Date: Circa 1985 Movement: Jewelled quartz Dial: Grey grid, applied polished luminous filled baton hour markers, date aperture at 3, polished baton hands with luminous inserts Case: Brushed and polished octagonal, back secured by 8 screws, 8 screws to bezel, No.047 Strap/Bracelet: Fitted brushed link Buckle/Clasp: Signed stainless steel folding clasp Signed: Case, dial & movement Size: 30mm 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. The brand has had a long and established history with producing mid-sized Royal Oak models. There has always been a smaller, alternate offer to the 'Jumbo' ones.