Housed in a case of 44mm, the Royal Oak Tourbillon Chronograph is one of the largest non-Offshore Royal Oak models available. It is powered by the hand-wound caliber 2889 movement, which pairs a tourbillon with a column wheel chronograph – an signature AP combination.Reference 25977ST.OO.D002CR.01 has a stainless steel case. Both the dial as well as the alligator strap are black.
