azing at the new Royal Oak Perpetual Calendar designed by musician and watch collector extraordinaire John Mayer, in collaboration with Audemars Piguet, is like looking through a window into the cosmos. The visual effect of what the brand calls its “Crystal Sky” dial is like peering into the vast inexorable future, which is fitting as this watch is the very last of its kind. There’s no looking back after this. It’s the final Royal Oak Perpetual Calendar featuring the caliber 5134, based on the venerable ultra thin caliber 2121, with its signature week-of-the-year indicator read off the perimeter of the dial. After this, it’s done. Finito. Basta. Over. I say this with some emotion as this is THE watch that made the perpetual calendar relevant to an entire new generation of customers, and it is now created in its final outing as
