About the Audemars Piguet 25978BC.ZZ.1190BC.01
The Royal Oak Chronograph follows the classic design of the original Royal Oak, with the added functionality of a chronograph complication. The case measures 39mm across, housing the self-winding caliber 2385 movement. A larger version was introduced in 2012.
Reference 25978BC.ZZ.1190BC.01 has its case, bracelet and dial set with a total of 892 brilliant-cut diamonds.