25820PT, ‘Tuscan’ Dial Royal Oak Quantième Perpétuel, Platinum LineSport a tone made by mixing

a tone made by mixing gold and ruthenium which took months of development

The restrained clarity of its outsized date dial

On date-matching 78360 Oyster bracelet

The Zeitwerk Date brings the most technically innovative pillar of A

and refined design

25820PT, ‘Tuscan’ Dial Royal Oak Quantième Perpétuel, Platinum LineSport a tone made by mixingA ref. 25820PT Royal Oak Perpetual Calendar, 1 of 12 examples made with a Tuscan dial. Tuscan dials are a laboriously hand hammered finished with a vibrant galvanic blue, the earliest known use of a tremblage technique in a wristwatch dial. The are days of effort resulting in this cratered surface. Under loupe, it appears as an ocean of waves crashing. The 25820 was the first Royal Oak Perpetual Calendar to feature leap year indication, carrying on