The Audemars Piguet Millenary Chronograph is based on the unique Millenary design but it incorporates a chronograph movement which is a rare thing for the Millenary collection. The Audemars Piguet Millenary Chronograph uses the automatic AP caliber 2385 movement with a power reserve of forty hours. The case is made eighteen karat rose gold with a strap made of brown alligator skin.