1975-1979 pre-owned Royal Oak 36mm from Audemars Piguet featuring indigo blue, 18kt yellow gold, octagonal face, index dial, index hands, 60-second counter, screw-down crown, adjustable link bracelet, clasp fastening, quartz movement, water resistance up to 50m/5 ATM, circa 1975-1979 and 36mm. Original box, papers and WatchBox certificate.. This watch has been evaluated and authenticated by a WatchBox in-house Swiss-trained watchmaker.. This item comes with a standard two-year warranty from WatchBox..