Audemars Piguet Royal Oak 25572ST White Dial Day DateThis is the incredible 36mm Royal Oak reference 25572ST. A reference that we adore, simply for its size and the addition of the quirky and stylish sub dials functioning as a day date complication. The reference was the first Royal Oak with a calendar complication, introduced in 1983 under the name 5572 and one year later renamed to 25572. Only 1. 770 examples of this watch are produced in total of which 576 in steel, making it a very rare time piece.