Machining this avant-garde material, Audemars Piguet Royal Oak Offshore Diver Replica Watch around seven times harder than steel and which only diamonds can scratch, calls for the use of special machines and tools equipped with diamond-tipped milling-cutters.Fully compliant with the NIHS 92-11 (ISO6425) norm, this selfwinding model with its powerful design, built for subaquatic this…