The Audemars Piguet Royal Oak 25979ST.OO.D002CA.01—also known as the City of Sails chronograph—is a striking limited-edition watch created in 2002–2003 to celebrate 30 years of the Royal Oak. Just 1,250 pieces were made, with 1,000 in stainless steel. Highlighting its nautical theme, the solid steel case back is engraved with “ROYAL OAK – 30th ANNIVERSARY – CITY OF SAILS” and features a high‑relief sailboat motif.
