Audemars Piguet Royal Oak Offshore 15720ST. 01 Diver Stainless Steel Blue Dial. This Royal Oak Offshore is crafted in a stainless steel case measuring 42mm in diameter. The blue dial features the’Mega Tapisserie’ pattern, white gold applied hour-markers and Royal Oak hands with luminescent coating, and a black rotating inner bezel with zone from 60 to 15 minutes in white. The watch comes on a blue rubber strap. Original box, original papers.