This is a gorgeous Audemars Piguet Royal Oak Quantieme Perpetuel Calendar in 18kt rose gold. This selfwinding perpetual calendar watch indicates the day, date, moon phases, month and leap years. The 39mm case has a sapphire case back to view the beautiful selfwinding movement. The brown chocolate dial with “Grande Tapisserie” pattern with pink gold applied hour-markers and Royal Oak hands with luminescent coating is pristine. This beauty comes on its original brown crocodile strap with 18kt pink gold deployant AP buckle. These AP perpetuals have become increasingly collectible these past few years as the 39mm size has been discontinued.